$4z+8y-2t+5t+8z-6y$
$76^2-24^2$
$\left(4x-2\right)\left(8x+8\right)$
$\left(a-9^2\right)$
$\cot x=\tan x+\cot x$
$\frac{1}{csc^2x}+\frac{1}{sec^2x}$
$\int_0^{\sqrt{3}}\left(\frac{1}{\left(1+x^2\right)^3}\right)dx$
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