$f\left(x\right)=x^2+9x+20$
$\int2x^4cos\left(2x^5\right)dx$
$\lim_{x\to0}\left(\frac{e^x-e^2}{sen\:x}\right)$
$\left(3m-5m+3x\right)^2$
$\frac{\sec\left(x\right)^2-1}{\sin\left(x\right)^2}-1\:$
$p2\:-\:6p\:+\:9\:$
$\lim_{x\to1}\left(\frac{x^2+5x+6}{x^2+2x+3}\right)$
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