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(x)=0.13x(3)-2.8x(2)+23x+52
We move all terms to the left:
(x)-(0.13x(3)-2.8x(2)+23x+52)=0
We add all the numbers together, and all the variables
-(+0.13x^3-2.8x^2+23x+52)+x=0
We get rid of parentheses
-0.13x^3+2.8x^2-23x+x-52=0
We do not support expression: x^3
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