$\int3x^{-1}dx$
$-8-u=-6$
$-7x^3+3x^2-5x$
$\frac{sen8xcos3x+cos7xsen2x}{sen10x}\:$
$\int\frac{x^3+3x-2}{x^2-x}dx$
$-4\sqrt{27}\cdot8\sqrt{12}$
$-4\left(x^2+x+1\right)$
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