$\left(2a-5\right)\left(5+2a\right)$
$-0.5\left(-3y+10\right)$
$x+2x+5>20$
$\:\left(4x-7\right)\left(4x+2\right)\:$
$9a^4z+90b^2-4a^4z+3b^2+a^4z$
$72x^2+54x=35$
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