$2\left(-3\right)+5\left(-3x^2\right)+1\:\:$

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

$4x\left(5\cdot2\right)+\left(3\cdot5\right)-55$

$3 - 2 ( x - 1 ) \leq 2 ( 4 + x )$

$\int\frac{\left(4t^4-3t^3-2t^2+6t+5\right)}{t^2-4}dt$

$\left(x\:+\:2\right)\left(x\:-\:4\right)\left(3x\:+\:2\right)$

$\int\frac{x^2}{\sqrt{121+x^2}}dx$