$9x^2-150x+625$
$\left(-6\right)+\left(14-2\right)-\left[9-\left(-4\right)\right]$
$4\left(4+b''\right)$
$-6\:x\:\:62$
$x-2y=-4$
$480\cdot0$
$\left(2p^7+r^4\right)^2$
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