$81y^4+180y^2+100$
$\int\frac{5x-1}{25x^2+70x+49}dx$
$\left(-21\right)-\left(-18\right)$
$\frac{dy}{dx}\:\left(\frac{x-y}{y}\right)=\frac{x+y}{x}$
$3\sin^2\left(x\right)-5\cos\left(x\right)=1$
$x^2-12x+36=0$
$+\frac{1}{2}\left(-4\right)$
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