$-103+834$
$3n-12n^2-27$
$\cos\left(2x\right)=\frac{1-\tan\left(x\right)^2}{1+\tan\left(+\right)^2}$
$\left(x^2+2x-1\right)^3\left(5x\right)$
$\int8x\left(5-x^2\right)^{\frac{1}{3}}dx$
$\int\sen^{2}6x\cos^{2}6xdx$
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