$x^2-2\sqrt{5}-2>0$
$\frac{dy}{dx}x\sqrt{\left(x^2+20\right)}$
$4x^2+40x+25$
$\int\left(\frac{\left(2-x\right)}{\left(x^2+3\right)}\right)dx$
$2x^2-13x+20$
$\int\:\frac{\left(x^3-1\right)}{x^2\cdot\:\left(x-2\right)^3}$
$-xy^{4}-y^{4}x^{2}=80x^{2}-3y^{4}x^{5}$
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