Cheat Sheet

Anyuthing between "[math]" and "[/math]" will be converted to math equasions.
Basic rule: "[fn]" means function. "[br]" will break the line

COde	Preview
y=ax^2+bx+c	\[y=ax^2+bx+c\]
[fn]frac{x^3+1}{x+1}	\[\frac{x^3+1}{x+1}\]
[fn]cfrac{ [fn]cfrac{3x+1}{x^2-1} }{ [br] x^3+1 [br] }	\[\cfrac{ \cfrac{3x+1}{x^2-1} }{ \ \ x^3+1 \ \ }\]
f(x)= [fn]left [fn]{[fn]begin{array}{l}1　(x＝1のとき) [br]0　(x≠1のとき)[fn]end{array}[fn]right.	\[f(x)= \left \{\begin{array}{l}1　(x＝1のとき) \\0　(x≠1のとき)\end{array}\right.\]
[fn]dot{x}, [fn]ddot{x}	\[\dot{x}, \ddot{x}\]
a_{ij}	\[a_{ij}\]
{}_{n}C_{k}	\[{}_{n}C_{k}\]
{}^{i}_{j}T^{k}_{h}	\[{}^{i}_{j}T^{k}_{h}\]
[fn]sqrt{x}	\[\sqrt{x}\]
S_n=[fn]sum_{k=1}^{n} (x_k)^2	\[S_n=\sum_{k=1}^{n} (x_k)^2 \]
[fn]lim_{h [fn]to 0} [fn]frac{[fn]sqrt{a+h}-[fn]sqrt{a}}{h}	\[\lim_{h \to 0} \frac{\sqrt{a+h}-\sqrt{a}}{h} \]
[fn]frac{d^2y}{dx^2}=2x+3	\[\frac{d^2y}{dx^2}=2x+3 \]
[fn]frac{[fn]partial^2 f}{[fn]partial x^2} =2x+y	\[\frac{\partial^2 f}{\partial x^2} =2x+y \]
I=[fn]int_{1}^{3} x^2 dx	\[I=\int_{1}^{3} x^2 dx \]
I=[fn]int_{0}^{ [fn]frac {1}{2}} [fn]frac{x}{[fn]sqrt{1-x^2}} dx	\[I=\int_{0}^{ \frac {1}{2}} \frac{x}{\sqrt{1-x^2}} dx \]
{}_n P _r	\[{}_n P _r \]
[fn]overrightarrow{AB}	\[\overrightarrow{AB} \]
A=[fn]begin{pmatrix} 2 & 1 [br] 2 & 3 [fn]end{pmatrix}	\[A=\begin{pmatrix} 2 & 1 \\ 2 & 3 \end{pmatrix} \]
A=[fn]left[[fn]begin{array}{ccc}a_{11} & a_{12} & a_{13} [br]a_{21} & a_{22} & a_{23} [br]a_{31} & a_{32} & a_{33} [br][fn]end{array}[fn]right]	\[A=\left[ \begin{array}{ccc} a_{11} & a_{12} & a_{13} \\ a_{21} & a_{22} & a_{23} \\ a_{31} & a_{32} & a_{33} \\ \end{array} \right] \]

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