$\int\frac{1-sen^2x}{sen^4x}dx$
$\left(-6\right)^{12}\:x\:\left(-6\right)^5\:x\:\left(-6\right)^2$
$\int\frac{5x+3}{x^2+4x-12}dx$
$\lim_{x\to1}\left(\frac{cos\left(\pi x\right)}{\ln\left(x\right)}\right)$
$-24\:\cdot\:-7\:+\:67\:\cdot\:0$
$5+2x=4x+1$
$\left(-3b\right)\left(2x+a\right)$
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