$100^2r-160r+64$
$\int\frac{-x+3x^2+5}{x^3+8x}dx$
$\left(-4\right)^2.5+6$
$-\left(-4.5q+10\right)$
$axy-xy$
$\left(6-2d\right)^3$
$4cos^2\left(\frac{\pi}{2}\right)-3sin^2\left(\frac{\pi\:}{2}\right)$
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