$\int sec^3x\:ydx$
$\lim_{x\to0}\frac{\cos\left(x+a\right)-\cos\left(a\right)}{x}$
$876+987$
$\frac{dy}{dx}+y=100$
$\left(-115\right)\cdot8$
$\left(2x-3\right)\left(3x-4\right)$
$\left(x^2+y^3-8\right)\left(8+x^2y^3\right)$
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