$3^2+2^2-2$
$1936z+20z^2-660$
$8\:+4\:x\:1^2$
$80^2$
$\log\:\left(x-2\right)-\log\:\left(x+2\right)-\log\:\left(y-7\right)-\log\:\left(y-5\right)$
$2s^3t-16t^4$
$\lim_{x\to1}\left(\frac{1-\cos\left(4x-4\right)}{1-\cos\left(2x-2\right)}\right)$
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