$a2\:-30+225$
$\left(-42\right)^3$
$10^2\cdot10^9$
$2x^2-13x+6$
$\ \sqrt{81a^7b^{12}c^9}$
$16a^2+24ab+96b^2$
$\int y\cdot\sqrt{9+y^2}dy$
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