$\int_0^1\frac{3}{x^5}dx$
$9k^2-6k+1$
$\frac{\pi}{-\frac{\pi}{w}}$
$4x^2+2x=12$
$\int\frac{2}{\sqrt{a}}da$
$sen^23a=\frac{1}{4}$
$20+90+51^2$
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