$3x^2-26x-9$
$-\frac{4}{7}+\frac{2}{7}x-14x+\frac{4}{7}$
$x^2+8.x^2$
$9x^2+18x+17$
$\int3\sin^4xdx$
$\frac{2+tan^2\left(u\right)}{sec^2u}$
$\frac{d}{dx}2x^2-5x+2$
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