$\lim_{x\to0}\left(cot\:x\right)\frac{1}{inx}$
$-8\cdot16$
$\frac{dx}{dy}+\frac{4x}{y}=y^2-1$
$\left(a+2x\right)^3$
$\frac{-1+5}{4}>2\cdot\left(-1\right)+\frac{-1}{3}$
$\frac{2\left(cosx\right)^2}{2cosx-sen2x}$
$\int6x\cdot\cos\left(x^2\right)dx$
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