Final answer to the problem
$x^{6}-\frac{10}{9}x^3b^3+\left(-\frac{5}{9}b^3\right)^2$
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Step-by-step Solution
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1
Expand $\left(x^3-\frac{5}{9}b^3\right)^2$
$x^{6}-\frac{10}{9}x^3b^3+\left(-\frac{5}{9}b^3\right)^2$
Final answer to the problem
$x^{6}-\frac{10}{9}x^3b^3+\left(-\frac{5}{9}b^3\right)^2$