Teorema del binomio

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Expande ${\left( {a + b} \right)^4}$ $(a + b)^{4}$ , usando:
1. El triángulo de Pascal
2. El teorema del binomio
Expande:
1. ${\left( {5x + 2} \right)^3}$
2. ${\left( {2x - 3y} \right)^4}$

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