$\lim_{x\to3}\left(x^2-3x+2\right)$

$\int2tan\left(10x\right)^5dx$

$5xy-x^2t+2xy+3x^2t$

$\frac{3x-2}{5}\le x+4$

$\frac{1-\cos2\left(x\right)}{2}-\frac{1+\cos2\left(x\right)}{2}$

$\int\left(x^2-2x\right)\cos\left(\frac{x}{2}\right)dx$

$\sin\left(\pi\right)\cos\left(x\right)-\cos\left(\pi\right)\sin\left(x\right)$