$\left(z^4\right)^3$
$\int cosxcos7xdx$
$\int x\left(sen^2xcos^7x\right)dx$
$\frac{dy}{dx}y=4x^3+3x^{-3}+6x-6$
$\left(7x-9\right)\left(7x\:+\:9\right)$
$27x^2+45x$
$\int\left(x^2\left(x^3+6\right)^6\right)dx$
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