$9+42x+49x^2$
$\int\frac{1-x+2x^2-x^3}{x\left(x^2+1\right)^2}\:dx$
$-9\left(6m-3\right)+6\left(1+4m\right)$
$ax+x-2a^2x^3$
$24a^2b^2-8ab^2$
$\int x^3\sqrt{b^2-x^2}dx$
$3x^6+9x^5-x^9+3+2x^6$
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