(adsbygoogle = window.adsbygoogle || []).push({}); any technique or "trick" for finding the coefficient

Here is the polynomial expression

(x+x^2+x^3+x^4+x^5+x^6)^5

Each x term is raised to ascending powers of 1.

The entire sum in the brackets is raised to the 5th power.

Does anyone have any "special trick" for finding the coefficient of the term which contains x^19?

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# Any technique or trick for finding the coefficient

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