$\frac{2x^3-7x^2-8x-2}{x+1}$

$x2\:-\:\:1\:0x\:+\:2$

$f\left(x\right)=\left(6x^2+7x\right)^2$

$\frac{dy}{dx}=2-7x,\:where\:x\left(1\right)=-4$

$\frac{\left(n^2+1\right)}{\sqrt{9^n+1}}\left(x-7\right)^n$

$\frac{1}{cos^2\alpha\:}+\frac{1}{sen^2\alpha\:}=\frac{1}{sen^2\alpha\:\cdot cos^2\alpha\:}$

$4m^2+12m-16$