$9x^2<x^2+14$
$a^2x^2-3by^2+2^2x^2-3by^2$
$8y^2-96y=0$
$\left(x+4\right)\left(x+9\right)+\left(2x-6\right)\left(2x+6\right)$
$x^3+2x^2-1$
$9x^4-25y^6$
$\lim_{x\to\infty}\left(\frac{2\left(\left(x^2-1\right)e^{\frac{1}{x^2}}-x^2\right)}{x}\right)$
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