$\int x\left(7-x^2\right)^{15}dx$
$4x^4-49y^6$
$\int\:\frac{x^3+2x^2}{\sqrt{x}}dx$
$\left(-6x^2-6x-3\right)^2$
$2x^2+8x-14$
$\sin^2225+\cos^2315$
$g^2+2gm+m^2$
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