$5780\cdot248$
$20+90+516$
$x-4\ge2-2x^2$
$3x+2\le\:2x+3$
$\int\frac{\frac{19}{49}x}{\left(x-4\right)^2}dx$
$\int sen\left(\frac{\pi\:}{3}-x\right)dx$
$\left(\frac{2}{5}x^2-\frac{1}{2}y\right)^2$
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