$x^2-8x+9=0$
$ydy-7dx+8y^2dy-dx=0$
$\frac{1}{x}<-8$
$\left(-x^2+2x+3\right)\left(-x^2+2x+3\right)$
$q^2+2q+2q^2$
$\lim_{x\to0}\left(\frac{\left(e^{2x}-e^{-5x}\right)}{ln\left(1+x\right)}\right)$
$x^3+4x^2-9x-36$
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