$x^2-10x-7=0$
$x+1=2x+1$
$\left(\:2-3n\right)\left(2+3n\right)$
$x^4+5x^2-24$
$\int\frac{2x^2-5}{\left(x^2+4\right)\left(x^2-9\right)}dx$
$\frac{x^{2}+4x}{4x^{3}-64x}$
$\sqrt{20x^{16}y^{25}}$
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