$-53\cdot18$

$\frac{d^2}{dx^2}\left(3x^2+6x+6\right)$

$242\left(7\right)\:en\:base\:12$

$\int\frac{2x^3}{\left(x^2+2\right)^3}dx$

$\lim_{x\to1}\left(\frac{x-1}{x^2-x-2}\right)$

$\frac{\left(\sin\left(x\right)+\cos\left(x\right)\right)\left(\sin\left(x\right)-\cos\left(x\right)\right)}{\cos\left(x\right)}$

$1+e^{-5x}y^'=0$