$225x^2-90+9$

$\int3x^2sen\left(x^3+1\right)\:dx$

$\frac{dy}{dx}\left(x^3y^2+\cos\left(y\right)=x^3\right)$

$x^2\left(n+1\right)+x\left(n+1\right)-12\left(n+1\right)$

$\left(3y+1\right)\left(y+2\right)$

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

$4x^2-17x-5$