$\frac{dy}{dx}=\frac{xy}{\left(x+1\right)\left(x-1\right)}$
$cos2\:x\:tan'\:x\:+\:cos2\:x\:-\:1cos2\:x$
$y\:=\:sqrt\left(x\right)e^x^2\left(x^2\:+\:4\right)^8$
$w=x^2-y^2$
$3x+7\ge2x-3$
$\int_{-1}^1\left(-72x+12x^3-12x^2+4x-1\right)\:dx$
$\frac{-2+n}{12}=1$
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