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  "body": "\n## Statement\n\nThe analogue of $\\exp(x)\\exp(y)=\\exp(x+y)$ does not hold for real numbers $x$ and $y$. However, if these are operators satisfying the commutation relation $xy=qyx$, then $e_q(x)e_q(y)=e_q(x+y)$ holds true.\n",
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