$25x^2-3x+9$
$9-2x+7$
$\left(\frac{1}{2}x+\frac{1}{2}y-1\right)\left(\frac{1}{2}x+\frac{1}{2}y+1\right)$
$\lim_{x\to\infty}\left(\frac{2x}{x-8}\right)$
$3x-12>2x+15$
$-x^2-12x-50$
$\int\sqrt{1+\sin^2\left(x\right)}\cos\left(x\right)dx$
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