$\int_0^{\pi}\left(sec^2\left(\frac{t}{3}\right)\right)dt$
$\lim_{x\to3}\left(\frac{2}{x-2}\right)$
$x+3\sqrt{x}-4=0$
$8\left(-15-18\right)$
$-6x\:-32\:8x\:-14$
$\frac{2x^3-x^2+2}{x^2-x}$
$z^2-13z+30$
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