Series expansion with constant multiplier

Expand $(8 - 9x^3 + 18x^4)^{ rac{4}{3}}$ as far as $x^{8}$ .

~15 minAnswer checked instantlyBinomial TheoremPower Series

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XV. Multinomial Theorem, Examples XV, No. 18

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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).