$\int\frac{1}{x^2}sin\frac{\pi}{x}dx$
$-44\cdot26$
$9\cdot22$
$2x^2\frac{dy}{dx}+4xy=3\sin\left(x\right)$
$4\left(4c+5\right)+4$
$\frac{x^5}{x^2-4}$
$3x+11y=47$
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