$\left(7x+4q\right)^2$
$20\frac{1}{2}-2\frac{1}{2}+4\frac{5}{6}-2\frac{1}{6}$
$3z-9=9$
$22-5+18-3+12-1$
$-7-\left(-5\right)$
$\left(\frac{1}{3}m+5n\right)^3$
$x\frac{dy}{dx}=y^2-1$
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