$9\int sinx\cdot\cos\left(x\right)dx$
$y^2+5y-50$
$-9x+8-7x^2-x+6$
$\frac{7}{8}x-5=\frac{9}{10}x-8$
$\left(b^2+2\right)\left(b^2-2\right)$
$\lim_{x\to0}\left(\frac{e^x+cos\left(x\right)}{2cos\left(x\right)-x\cdot sin\left(x\right)}\right)$
$\left(\:2x\:+\:9y\:\right)^3$
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