$-12\:+\:18\:+\:9\:+\:4$
$\int\:\frac{1}{sen\left(2x+\frac{\pi\:}{4}\right)^2}dx$
$\sqrt{1}+2$
$x^2+\frac{x}{2}x+\frac{x}{16}^2$
$\left(17^6\right)^3$
$57a+18a+45=98+22a$
$x2+14x+48$
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