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(4x+5)(4x-5)-(2x-3)^2-3(x+5)^2-7=0
We use the square of the difference formula
16x^2-(2x-3)^2-3(x+5)^2-25-7=0
We add all the numbers together, and all the variables
16x^2-(2x-3)^2-3(x+5)^2-32=0
We move all terms containing x to the left, all other terms to the right
16x^2-(2x-3)^2-3(x+5)^2=32
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