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(7x-2)^2-(x-4)(x+4)=(8x+1)(8x-1)-(4x+3)^2+30
We move all terms to the left:
(7x-2)^2-(x-4)(x+4)-((8x+1)(8x-1)-(4x+3)^2+30)=0
We use the square of the difference formula
x^2+64x^2+(7x-2)^2+16+1=0
We add all the numbers together, and all the variables
65x^2+(7x-2)^2+17=0
We move all terms containing x to the left, all other terms to the right
65x^2+(7x-2)^2=-17
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