$\frac{1+sen\left(x\right)}{1-sen\left(x\right)}$
$\int\frac{x^3+1}{\left(x+2\right)\left(x-1\right)}dx$
$100a^2bc-5abc+150abc^2$
$6x^2y^2+8xy^6$
$2x^2-5x+3=0$
$x^2-5x-6x$
$\frac{d^2}{dx^2}\left(\frac{sin\left(y\right)}{x^2}\right)$
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