$\frac{d^2y}{dx^2}=\frac{1}{x^2}$
$-7n-7-8+10n$
$\int5\left(x+1\right)\sqrt[4]{x^2+2x+3}dx$
$\frac{dy}{dx}=sin\left(2x\right)y^2$
$2n^2+9n-5$
$\int\frac{\sqrt{x^2+121}}{x}dx$
$5x^3-125x$
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