$\frac{dy}{dx}=\frac{\sqrt{4-4y^2}\cdot\:\left(2x+1\right)}{\sqrt{4x^2+4x+1}}$
$\left(200x^2-50\right)$
$u3-64$
$\int\:\frac{2x}{3}+7-\left(-2x+3\right)dx$
$21.39+14.25+8.72$
$y+sin\left(x\right)=x^3y'$
$\int\:e^{4t}\sin\left(6t\right)dt$
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