$\left(a^2b^2+c^3\right)\left(a^2b^2-c^3\right)$

$\left(2-z\right)^3$

$\frac{\cos\left(x\right)}{\sin\left(x\right)}+\frac{\sin\left(x\right)}{1+\cos\left(x\right)}=\csc\left(x\right)$

$\int_{-\infty}^0e^x\cos\left(2x\right)dx$

$a=4x^2+16x+16$

$7u^2\left(u\:-9\right)\:-\:2\left(u\:-\:9\right)\:$

$4x-2y+3z=12$