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$81x^2+3x+36$
$\left(a+1\right)^{2}$
$16x^5+40x^3y^3+25xy^6$
$\frac{1}{4}\int\frac{1}{cos^2z}dz$
$2\sin\left(x\right)\sec\left(x\right)\tan\left(x\right)$
$sen^{-1}\left(\frac{1}{3}\right)+\:tan^{-1}\left(x\right)=\:\frac{\pi}{2}$
$\lim_{x\to0}\left(\frac{2n^2log\left(n\right)}{\left(log\left(n\right)\right)^4}\right)$
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