$5y^2+15y$
$\left(37\right)^2$
$20x^2-148x+177$
$\left(3x^3-x\right)\left(14x^{-1}\right)$
$a^2+\left(2a^2-4a^2\right)-\left(4a^2-5a^2\right)$
$1+2i\cdot3-4i$
$4\left(y+3\right)+8\left(y-4\right)+6$
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