$\left(3n^2\right)\left(4n^2-5n-1\right)$
$36x^2-36x-6$
$\:2x+\frac{1}{x+1}=\:\frac{7}{2}$
$\int\:\cot\:\left(-\frac{9}{2}x\right)dx$
$\int\:\frac{u+1}{1+u^2}du$
$l-\:4\:l\:\:+\:l\:1\:l$
$4a^3+20a^2-64$
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