$x\frac{dy}{dx}-2y=x^2+x\:,\:y\left(1\right)=1$
$5ab+10bc-15ab$
$\lim_{x\to3}\left(\frac{8^{x}-10x-42}{2x-6}\right)$
$\int3\:cos\:\left(2x-1\right)\:dx$
$\int3\:2^xdx$
$\frac{12^3}{12}$
$\int\left(\frac{1}{4x-7}\right)dx$
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