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y3=-64/729
We move all terms to the left:
y3-(-64/729)=0
We add all the numbers together, and all the variables
y^3-(-64/729)=0
We get rid of parentheses
y^3+64/729=0
We multiply all the terms by the denominator
y^3*729+64=0
We do not support eypression: y^3
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