Final answer to the problem
$8x^3-1296y^3$
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Step-by-step Solution
Specify the solving method
1
Calculate the power $6^4$
$8x^3- 1296y^3$
2
Multiply $-1$ times $1296$
$8x^3-1296y^3$
Final answer to the problem
$8x^3-1296y^3$