$\left(2x+3y-4z+w\right)^2$
$2888+42$
$2x+1\:+\:2x-1\:are$
$\frac{d}{dt}\frac{t}{3}$
$\left(m+1\right)^2\left(m-1\right)^2$
$-8.8^2$
$t^2-10t+9=0$
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