$\int-sen\left(5x\right)\cdot sen\left(cos\left(5x\right)\right)dx$
$\lim_{x\to25}\left(\frac{x-25}{\sqrt{x-5}}\right)$
$\left(1+\sqrt{5}\right)^7$
$-3x^2+2x+4$
$\int\sec2\left(4-6x\right)dx$
$\int\left(\frac{2x+8}{3x-4}\right)dx$
$\left(9x+7x^3\right)\left(9x-7x^3\right)$
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