$edy=dx$
$3y+7=31$
$x^2-\frac{3}{4}x=5$
$\int2\left(a+bx\right)^2dx$
$\frac{r^9-1}{r^3-1}$
$\frac{7\cdot6\cdot5\cdot4}{4\:\:}\left(4m^3\right)\left(125\right)$
$\left(\frac{1}{5}-x\right)\left(\frac{1}{7}+x\right)$
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