$\int\cos\left(4x+5\right)dx$
$40^6-20a^3b^4+25b$
$x^2+18x+2=0$
$2x^2-x-15=0$
$\left\{-\:3\:\left[\left(2\:+\:1\right)\:+\:\left(-\:6\:+\:8\right)\right]\:+\:10\right\}$
$9q^2-\frac{2}{3}\left(3q-7\right)+5q^2$
$\lim_{y\to3}\left(\frac{ye^{y-3}-3}{\ln\left(y-2\right)}\right)$
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