$-5\left(-1+4\right)+10$
$\cos^2\left(60\right)$
$z=\left(7i+\frac{9}{i}\right)^{-1}$
$\left(x^2+5x+4x+20\right)$
$h\left(x\right)=8-9\:\log\left(\frac{x}{9}-7\right)$
$5x+2=x+10$
$\int\left(x\left(2x+5\right)^8\right)dx$
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