$40-\left(-300\right)+30$
$\left(2n^3\right)^2$
$4x^2+8x+1$
$x^2-11x+7$
$\left(1+2\right)\left(4+7\right)$
$\left(7x+3\right)\left(3+2y\right)$
$y'\:=\:3y\:+\:4$
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