$\sin\left(37\right)\cdot\cos\left(7\right)+\sin\left(7\right)\cdot\cos\left(30\right)$
$x+x+y-y$
$x^2-17x+60\le0$
$\left(13\:-\:\:9f\:\right)^3$
$\frac{dy}{dx}=\frac{1+y^2}{x}$
$\left(2x^2-3y^2+xy\right)-\left(x^2-2xy-3y^2\right)$
$\left(5a^5+\frac{4}{7}\right)\left(-\frac{4}{7}+5a^6\right)$
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