$x\:-\:3x^2\:+4x\:-3x^2$
$\sqrt{x+bcx}$
$-12+x=-3$
$\left(2a^2-3b^2\right)^3$
$216\:-\:5$
$\int_0^{\pi}\left(14\cdot3^{sen\left(x\right)}\cdot cos\:x\right)dx$
$20+5\cdot3-2\left(7-3\cdot2\right)$
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