$cos\left(2a+2b\right)-cos\left(2a\right)$
$f\left(x\right)=\left(x^5+6x\right)^8$
$\left(20ab^3-c^3\:\right)\left(20ab^3+c^3\:\right)$
$\int\left(\frac{x^3-1}{2x-2}\right)dx$
$8\left(z+1\right)$
$\left(-2\right)^8\cdot\left(2\right)^5$
$x^2+x-20\cdot x-2$
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