$\lim_{x\to11}\left(\frac{x^2-22x+121}{\sin^2\left(\pi x\right)}\right)$
$3z+8x+4z$
$\frac{x^2-1}{x}$
$+1+10-16-20$
$sen\theta\:+tan\theta\:$
$\left(\frac{3x^2}{2}\right)^2$
$\int_{-\pi2}^{\pi2}\cos\left(x\right)+x^2dx$
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