$36x^2+72x+36$
$\sqrt[4]{81x^2y^{18}}$
$\frac { 3 } { 3 } i ^ { 2 }$
$12a^3b\:and\:18ab^3$
$\int3c^{3x}dx$
$\left(a-9b\right)\left(5a+7b\right)$
$5xy^2105xy+550x$
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