$2y-8x+6=0$
$\:18\:+\:\left(-32\right)\:+\:13\:\left(-7\right)$
$u^2-4u+3$
$8x^2+32x+17$
$9.1^2$
$xy^2\:+\:\left(x^2\right)\left(y\right)\:=\:cx$
$4m^2+28+49$
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