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z/2^2=z-5
We move all terms to the left:
z/2^2-(z-5)=0
We get rid of parentheses
z/2^2-z+5=0
We multiply all the terms by the denominator
z-z*2^2+5*2^2=0
We add all the numbers together, and all the variables
z-z*2^2+20=0
Wy multiply elements
-2z^3+z+20=0
We do not support ezpression: z^3
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