$0.5+1.2+2$
$\left(11x+9\right)\left(11x-12\right)$
$2x^4-3y^3+2x^2y-3x^4+4y^3-2x^2y$
$\left(4x^3-5x^2+3x+2\right)+\left(3x^3-x-11\right)$
$\frac{\sin\:\left(x\right)}{\cos\left(x\right)^2.\sec\left(x\right)}$
$seno\:x\:=\:\frac{1}{2}$
$121d^2-66d+9$
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