$\lim_{x\to1}\left(\frac{x^2-1}{x^3-2x^2+2x-1}\right)$
$\cos^2\left(x\right)+8\cos\left(x\right)+15$
$8x-2y-8$
$x^2<60$
$\int x^2e^xdf$
$\left(-15x^4y^3\right)\left(-16x^2y^2\right)$
$x^2-\frac{x}{2}+\frac{1}{4}$
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