$4-7\cdot4-1$
$\int\left(x^3+3x^2+2x\right)e^{1-2x}dx$
$5u^2-25u$
$\int y^2\cdot\sqrt{4-y}dy$
$2x+4+5x$
$\frac{dy}{dx}-\frac{y}{x}=\frac{x^{-6}}{x}$
$\int\left(\frac{x^3}{\sqrt{x^2-2}}\right)dx$
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