$\int\left(\frac{5x^2-3x^2+2}{2x^2}\right)dx$
$49x^2-144$
$\frac{1}{\csc x}+\frac{1}{\tan x}$
$\left(3a^2-5a+7\right)\left(6a+1\right)$
$\left(-1\right)^n\frac{\left(x+3\right)^{n-1}}{n\left(3^n\right)}$
$log\:\left(\frac{a}{b}\right)=-x$
$\left(-19\right)+\left(-15\right)-\left(-6\right)-\left(-14\right)$
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