$y^2-5y^2+2y^2$
$\left(2x^3-3x^2-5x\right)\left(2x-5\right)$
$\left(3x\:2\:+\:17\right)\:\left(17\:-\:3x\:2\:\right)$
$\frac{\frac{1}{2+h}-\frac{1}{2}}{h}$
$3r-12s-5+r+9s+2$
$-x^2+3x-\frac{3}{2}^2$
$-2054-365$
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