$\left(a+3b\right)^4-22\left(a+3b\right)+121$
$\frac{dy}{dx}=\frac{-4}{40-2x}y+0.8,\:y\left(0\right)=6.5$
$x^4+2x^3+2x^2$
$2y'+4y=2x$
$-0.4+-0.9+0.8$
$\frac{dy}{dx}=x+3y\:$
$x^3+4x^2-17x-60$
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