$9x^2-9x-2=0$
$\:\left(2m-3n\right)^2$
$\:\frac{1}{\sqrt{1-2x}}$
$16p^2-40pq+25q^2$
$\int e^x\cdot2x$
$-12-\left(-16\right)-\left(-6\right)$
$x^2y+3xy-x=3$
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