$\left(3x^2\:+2y^2\:-z\right)^2$
$\frac{sen2x+cos2xsen2x}{sen2xsen2x}$
$x^4+x^3-12x^2$
$\frac{x^{11}-1}{x-1}$
$w=cos\left(x^2+y^2+z^2\right)$
$\left(4b^3\right)\left(5b^5\right)$
$30c^2+17c-21$
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