$6\:+\:l\:=\:l\:+\:6$
$10^7-b^7$
$\int\left(\frac{3x^2-4}{x^2}\right)dx$
$\frac{2x^3+3x-10}{x+3}$
$\int\cot^{-1}\left(3x\right)dx$
$\frac{1}{2-x}<3$
$9xy^2+6x^2y-4xy-2xz+3x^2y$
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