$y\frac{dy}{dx}=3\sqrt{xy^2+9x}$
$\int\left(6x^2+4x\right)\csc\left(x^3+x^2\right)dx$
$2\left(x-5\right)\le10x+14$
$\left(1-7n\right)\left(1+7n\right)$
$\left(4+12b\right)$
$10+-\left(-10\right)$
$3\cos^2x+\cos x-4$
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