# TeX

 $\frac{x}{y}$ \frac{x}{y} $f(x)$ f(x) $\int_{a}^{b} f (x)\,dx$ \int_{a}^{b} f (x)\,dx $\prod^{x=1}_{n}$ \prod^{x=1}_{n}  $\sum_{x=1}^{n}$ \sum_{x=1}^{n} $\frac{\partial x}{\partial y}$ \frac{\partial x}{\partial y} $\sqrt{x}$ \sqrt{x} $\sqrt[3]{x}$ \sqrt[3]{x} $\lim_{x\to\infty}$ \lim_{x\to\infty}
 $\sin$ \sin (x) $\cos$ \cos (x) $\tan$ \tan (x) $\log$ \log (x) $\ln$ \ln (x)
 $\le$ \le $\ge$ \ge $\neq$ \neq $\approx$ \approx $\equiv$ \equiv $\propto$ \propto
 $\Rightarrow$ \Rightarrow $\rightarrow$ \rightarrow $\Leftarrow$ \Leftarrow $\leftarrow$ \leftarrow $\Leftrightarrow$ \Leftrightarrow $\vec{x}$ \vec{x} $\mapsto$ \mapsto