$3v+5-9v+2$

$cot^2x=cot\:x$

$6+\left(-2\right)-\left(-4\right)-\left(-5\right)-\left(-2\right)-\left(-3\right)+2-4$

$\int\frac{2x^2-x-129}{\left(x+7\right)^2\left(x-1\right)}dx$

$2\:csc\left(x\right)=\frac{\sin\left(x\right)}{1+\cos\left(x\right)}+\frac{1+\cos\left(x\right)}{\sin\left(x\right)}$

$\int\frac{5-x^2}{x^2-4x+4}dt$

$n+n+n$