$\int\:\frac{-5}{\sec\left(x\right)-\cos\left(x\right)}dx$
$8\cdot66$
$4+w^2+5+w^2$
$\frac{\left(2xy\right)^3}{16x^5y^3}$
$\frac{2a^4b^2}{7a^3b^2}$
$\left(\frac{2}{3}x+3\right)^3$
$\frac{2r-4}{r-2}$
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