$\int\frac{1}{\sqrt{x^2-169}}dx$
$14.6-0.2$
$\left(c+d\right)^2+8\left(c+d\right)+4$
$3x^2-12x-15$
$4x^2+4x-285$
$\frac{6x^4+5x^3-1}{2x^2+x-1}$
$\left(2x^2+y+3xy^2\right)\left(2x^2y-3xy^2\right)$
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