$4a^2e^2\:-\:d^2e^4$
$\frac{63\cdot\:\:0.75082}{2\pi}$
$121+198x^3+81x^6$
$\:\left(x^3-\:x^2\:+\:4\right)\:-\:\left(3x^3-2x^2+3\right)$
$\left(5ab^2+6\right)^3$
$\left(1+x+x^2\right)\left(1-x-x^2\right)$
$\int\left(\frac{cosx}{1-cosx}\right)dx$
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