$b^8-12b^6y+5b^2yz-byz$
$2\cos\left(15\right)^2-1$
$\left(2x^3y^4\right)^4\cdot\left(3xy^5\right)^2$
$39n^2+3n=0$
$x^8x^4-240$
$\frac{dy}{dx}-4y=2e^xy^{\frac{1}{2}}$
$y^2+5y-36$
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