$\int\left(\frac{x^2}{\left(1+9x\right)^2}\right)dx$
$x\frac{dy}{dx}=\frac{1-4v^2}{3v}$
$\left|1+\left(-76\right)\right|+\left(-57\right)$
$78=6\left(u+19\right)$
$6x+5\:6x+10$
$11-\left(67-57\right)$
$15x^2+20x+12$
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