(5x-3)^2-25x^2-10=25x^2-30x+9-25x^2-10=-30x-1
-30x-1=-30*3,5-1=-105-1=106
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(5x-3)^2-25x^2-10=25x^2-30x+9-25x^2-10=-30x-1
-30x-1=-30*3,5-1=-105-1=106