$\left(x-2\right)\:\frac{dy}{dx}+\frac{3\left(x-1\right)}{x-1}y=1$
$-a-4-a-2$
$34yz+57yz+-7yz$
$x\left(5x+15\right)$
$\int\frac{1}{\sqrt{x^2+1+2x\cos\left(a\right)}}dx$
$\int\:\frac{1}{x\sqrt{x^2-256}}dx$
$\sqrt{3}-2\sin\left(\frac{1}{3}x\right)$
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