$8v^2-72v$
$a^2b^8-c^2$
$\cos\left(2a+b\right)\cos\left(b\right)+\sin\left(2a+b\right)\sin\left(b\right)$
$\frac{2}{3}logax+logay-2logaz$
$\int17\cdot20^xcos\left(20^x\right)dx$
$x^2-10x<200$
$\left(3x^2+3y^2\right)-\left(2x^3-2y^3\right)$
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