$\frac{sec\left(\theta\:\right)}{1-sin\left(\theta\:\right)}=\frac{1+sin\left(\theta\:\right)}{cos^3\left(\theta\:\right)}$

$\int\:\:6t^2sin\:2tdt$

$144x^4-y^6$

$2\left(42+4\right)$

$\left(-1\right)x\left(-8x\right)x\left(-2\right)$

$\int\left(\frac{1}{4x+xln^2\left(x\right)}\right)dx$

$\lim_{x\to2}\left(\frac{x^2+3x+2}{x+2}\right)$