$4\left(9\right)^2+3\left(9\right)-3$
$a^2-2ab+10^2$
$200\:-\:\left(-27\right)$
$-\left(+4-10-2\right)+\left(-4-5+7\right)+15$
$4x+8y=2$
$m^2-16m\:+63$
$2t^2+1+4t$
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