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4x-28+-3+x4=1-2
We move all terms to the left:
4x-28+-3+x4-(1-2)=0
We add all the numbers together, and all the variables
4x+x4-28-3+-(-1)=0
We add all the numbers together, and all the variables
x^4+4x-30=0
We do not support expression: x^4
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