$tan\:x\:sin\:x=4sinx\:$

$\left(-3xy^4z^2\right)^{-3}\left(x^3z\right)$

$\frac{dy}{dx}=\frac{-xy^4}{\left(y^2+2\right)e^{-3x}}$

$\frac{\tan\left(x\right).\cot\left(x\right)}{sec\left(x\right)+\csc\left(x\right)}$

$\left(ab+7b\right)^2$

$\frac{dy}{dt}=y-3e^{-t}$

$\frac{6}{\left(x+2\right)\left(x+3\right)}$