$5+ln\left(x+1\right)=2$

$\tan\left(x\right)+\cot\left(x\right)-2\csc\left(2x\right)$

$\int\frac{9}{3x^2\sqrt{4x^2-9}}dx$

$\left(x^{-3}y^2\cdot\left(x^4y^4\right)^2\right)^{-4}\cdot2yx^2$

$\lim_{x\to0}\left(\frac{x^2}{e^{2x}}\right)$

$ex^{3}+y^{3}\right)dx-xy^{2}dy=0$

$mn\left(2x-3y-4z\right)$