$2x^2-3\cdot5x+1-6x^3+2x^2-7$
$m^2+71mn-14m^2-65mn+m^3-8mn$
$\frac{1+sen\left(x\right)}{1-sen\left(x\right)}$
$x^3+3x^2+2x-6$
$b^2+14b-49$
$\int\frac{x^2}{\left(x^3-5\right)^2}dx$
$\int_0^{0.5}\frac{1}{\sqrt{1-x^2}}dx$
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