$\lim_{x\to0}\left(\frac{\tan\left(x\right)^2}{1-\cos\left(x\right)}\right)$
$216x^3125$
$\left(4m+\frac{1}{2}\right)\left(4m+\frac{1}{2}\right)$
$-x^2+8<-x+2$
$\int-7cos^2xtan^3xdx$
$-x^2+13x+12$
$x^2-m^4-2m^2n-n^2$
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