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1/12d+1/6d+1/3d+1/12d=6
We move all terms to the left:
1/12d+1/6d+1/3d+1/12d-(6)=0
Domain of the equation: 12d!=0
d!=0/12
d!=0
d∈R
Domain of the equation: 6d!=0
d!=0/6
d!=0
d∈R
Domain of the equation: 3d!=0We calculate fractions
d!=0/3
d!=0
d∈R
We do not support edpression: d^3
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