$20x^2-20x+25$
$\int\frac{1}{\sqrt{1-sen\:2x}}dx$
$\int_1^2x^2\log\left(x\right)dx$
$16+4x^6$
$x+\frac{2}{x}+1$
$5\sqrt{4x-3}=5x$
$\frac{w^{-3}}{w^{-9}}$
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