$6x-x^2+91<0$

$\lim_{x\to-1}\left(x^3-4x+1\right)$

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

$\left(1+\sqrt[2]{3}x\right)\left(1-\sqrt[2]{3}x\right)$

$\left(4m-n\right)^2\:=\:16m^{2\:}$

$\frac{dy}{dx}=e^{\left(6y+7x\right)}$

$tan\left(x\right)=-\frac{1}{\sqrt{\left(3\right)}}$