$\left(a+1\right)\left(a+2\right)\left(a-1\right)\left(a-2\right)$
$-24=4y-8$
$\sqrt{36}+7$
$7\left(3+a\right)=7a$
$\left(-2i+5\right)^3$
$\int\frac{4}{\sqrt{x+3}}dx$
$-x^2-7x+10=0$
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