$35-12+34-8+71$
$\frac{4x-4}{x-2}$
$\frac{x^2+6x-16}{x+8}$
$=\frac{x}{\left(1+4x\right)^2},n=1$
$9\:cos^2x\:=\:12\:cos\:x\:-\:4$
$\lim_{x\to0}\left(\frac{2\cos\left(x\right)-2}{3\sin\left(x\right)}\right)$
$\int_0^{\infty}\left(sen^2\right)ada$
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