Hello guys! I'm a newbie here. I edited some pages and I created this page. I have another page about me, and it is at the Vietnamese Wikipedia.
And anyway, I'm from Vietnam and I can speak Vietnamese. I can show you how I typed in Vietnamese. Here's the language:"Con chó này rất hung dữ". That means:"This dog is very ferocious". And if something changed, I'll edit this page.
I just experiment this. [[1] ]<- This is also an experiment by me.
This is my favorite equation ->
r
1
=
−
a
4
−
1
2
a
2
4
−
2
b
3
+
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
−
1
2
a
2
2
−
4
b
3
−
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
−
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
−
−
a
3
+
4
a
b
−
8
c
4
a
2
4
−
2
b
3
+
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
r
2
=
−
a
4
−
1
2
a
2
4
+
2
b
3
+
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
−
1
2
a
2
2
−
4
b
3
−
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
−
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
−
−
a
3
+
4
a
b
−
8
c
4
a
2
4
−
2
b
3
+
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
r
3
=
−
a
4
+
1
2
a
2
4
−
2
b
3
+
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
−
1
2
a
2
2
−
4
b
3
−
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
−
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
−
−
a
3
+
4
a
b
−
8
c
4
a
2
4
−
2
b
3
+
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
r
4
=
−
a
4
+
1
2
a
2
4
+
2
b
3
+
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
−
1
2
a
2
2
−
4
b
3
−
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
−
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
−
−
a
3
+
4
a
b
−
8
c
4
a
2
4
−
2
b
3
+
2
1
3
(
b
2
−
3
a
c
+
12
d
)
3
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
)
1
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
+
−
4
(
b
2
−
3
a
c
+
12
d
)
3
+
(
2
b
3
−
9
a
b
c
+
27
c
2
+
27
a
2
d
−
72
b
d
)
2
54
)
1
3
{\displaystyle {\begin{aligned}r_{1}&={\frac {-a}{4}}-{\frac {1}{2}}{\sqrt {{\frac {a^{2}}{4}}-{\frac {2b}{3}}+{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}+\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}}}\\&-{\frac {1}{2}}{\sqrt {{\frac {a^{2}}{2}}-{\frac {4b}{3}}-{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}-\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}-{\frac {-a^{3}+4ab-8c}{4{\sqrt {{\frac {a^{2}}{4}}-{\frac {2b}{3}}+{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}+\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}}}}}}}\\r_{2}&={\frac {-a}{4}}-{\frac {1}{2}}{\sqrt {{\frac {a^{2}}{4}}+{\frac {2b}{3}}+{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}+\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}}}\\&-{\frac {1}{2}}{\sqrt {{\frac {a^{2}}{2}}-{\frac {4b}{3}}-{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}-\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}-{\frac {-a^{3}+4ab-8c}{4{\sqrt {{\frac {a^{2}}{4}}-{\frac {2b}{3}}+{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}+\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}}}}}}}\\r_{3}&={\frac {-a}{4}}+{\frac {1}{2}}{\sqrt {{\frac {a^{2}}{4}}-{\frac {2b}{3}}+{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}+\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}}}\\&-{\frac {1}{2}}{\sqrt {{\frac {a^{2}}{2}}-{\frac {4b}{3}}-{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}-\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}-{\frac {-a^{3}+4ab-8c}{4{\sqrt {{\frac {a^{2}}{4}}-{\frac {2b}{3}}+{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}+\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}}}}}}}\\r_{4}&={\frac {-a}{4}}+{\frac {1}{2}}{\sqrt {{\frac {a^{2}}{4}}+{\frac {2b}{3}}+{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}+\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}}}\\&-{\frac {1}{2}}{\sqrt {{\frac {a^{2}}{2}}-{\frac {4b}{3}}-{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}-\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}-{\frac {-a^{3}+4ab-8c}{4{\sqrt {{\frac {a^{2}}{4}}-{\frac {2b}{3}}+{\frac {2^{\frac {1}{3}}\left(b^{2}-3ac+12d\right)}{3{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}\right)}^{\frac {1}{3}}}}+\left({\frac {2b^{3}-9abc+27c^{2}+27a^{2}d-72bd+{\sqrt {-4{\left(b^{2}-3ac+12d\right)}^{3}+{\left(2b^{3}-9abc+27c^{2}+27a^{2}d-72bd\right)}^{2}}}}{54}}\right)^{\frac {1}{3}}}}}}}}\end{aligned}}}
motion 
