$28x^3+19x^2+3x$
$\int20x^4dx$
$\frac{16}{4}\cdot2$
$-xy^2+9xy^2+4xy^2$
$2y^2+3y^2-z^2$
$\left(115x+35\right)\left(85x+22\right)$
$\left(3x-a\right)^4$
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