$34.57+7.8262+.67$
$-tan\left(\frac{\pi}{2}\right)cos^2\left(\frac{\pi}{2}\right)$
$6x^2+5y^2+2x^2-3xy^2$
$6a^2+a^2\frac{1}{3}a^2$
$-2x+\left(-3y\right)-7-10y$
$-3\left(-4-2\right)\left(-5\right)-2\left(-2-3\right)$
$\lim_{x\to4}\frac{\sqrt{x-2}}{x-4}$
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