$\int\frac{1}{t^2+\frac{4}{9}}dt$
$2x^3vm-4x^2n+x^2v^2n$
$7\cdot\left(-3\right)\cdot9+9$
$\frac{d^6}{dx^6}\left(lnx\right)$
$\int_{\pi\:}^{2\pi\:}sen\:xdx$
$\left(-6\right)\left(-5\right)$
$8^5\cdot8^{-5}$
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