$\cos\left(t\right)\cdot\frac{sin\left(b\right)}{sin\left(b-t\right)}$
$-\:\:-\:\left[\:-\:\left(\:-20\:+15\:-7\right)\:-\:8\right]-\:6\:+7-\left(-3\right)$
$x^5-3ay^2\left(2\right)$
$4x-7<x\:+2$
$81a^4-16b^4$
$\int x^2\cdot\cos\left(3x\right)$
$32\cdot32$
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