$x^2-x-1x\cdot2x-1$
$\left(x+\frac{1}{2}m\right)\left(x-\frac{3}{2}m\right)$
$\left(50x\right)-\left(25\right)$
$5-4\cdot5$
$2xydy=\left(x^2-y^2\right)dx$
$4y^{3\:}+\:32$
$-17x^2+22x^2$
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