$-14mn^2-8$

$2\left(2x+2y\right)^2$

$\cos\left(x\right)\csc\left(x\right)-\sin\left(x\right)\csc\left(x\right)\cot\left(x\right)$

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

$x^2-11x-60=0$

$\int_2^4\left(3x^2+6x-7\right)dx$

$\int\left(2x\left(x^2+7\right)^7\right)dx$