$5\left(b-4a\:\right)\:-6\left(b-3a\:\right)$
$\int_{-1}^1\left(\frac{1}{x^2}\right)dx$
$\left(x+3\right)\left(3x+3\right)$
$\frac{99}{-11}-\frac{65}{-13}$
$25x^2+64m^2-80mx$
$-9.98x\:-\:1.08x$
$5^7x^3$
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