$\sqrt[3]{64^{2^{-1}}-8^{3^{-1}}+16^{2^{-2}}}$
$4x^2ydx+xydy=0$
$\lim_{x\to0}\left(3x^2-5x+3\right)$
$25m^2-36b^2$
$21d+5m+2m-14d-7d$
$6x^2+\:25x\:+\:4$
$\sec^2\left(4\right)-\tan^2\left(4\right)$
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