$-17-\left(-4\right)$
$\int x\left(sin\left(2x\right)cos\left(2x\right)\right)dx$
$\frac{7^9-7.7^7}{7.7^5.7}$
$\tan^2\left(17\right)+1$
$\left(xy+7\right)^3$
$9a^2-4$
$\left(2x^5-3x^2\right)^2$
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