$\left(2x^{a+4}-8y^{a-1}\right)^4$
$\int\left(cosx\sqrt{16-sin^2x}\right)dx$
$\csc\left(c\right)-\sin\left(c\right)=\cos\left(c\right)\cot\left(c\right)$
$\lim_{x\to0}\:\frac{x^3-sen2x}{xe^x}$
$\left(x+5\right)^2+8\le0$
$4\left(6-x\right)+5x=8x-3\left(x-4\right)$
$2x+5x^2=0$
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