$\int x\:\:\left(3x+2\right)^4\:dx$
$\left(1\:+\:cos\:x\right)\left(1\:-\:cos\:x\right)\:=\:sen2x$
$\left(2+8c^4\right)^3$
$\int\frac{2x+4}{x^2+4x+5}dx$
$\lim_{x\to\infty}\left(6tan\left(x+\frac{\pi}{2}\right)\right)$
$17x+19-x$
$cot\left(\frac{x}{2}\right)=0$
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