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20(7^2x)=40(5^3x+1)
We move all terms to the left:
20(7^2x)-(40(5^3x+1))=0
We calculate terms in parentheses: -(40(5^3x+1)), so:
40(5^3x+1)
We multiply parentheses
200x^3+40
We do not support expression: x^3
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