A = \(\left(2x-1\right)^2-\left(x+3\right)^2-3\left(x+5\right)\left(x-5\right)\)
A = \(4x^2-4x+1-x^2-6x-9-3x^2+75\)
A = \(-10x+67\)
B = \(\left(3x+5\right)^2+\left(3x-5\right)^2-\left(3x-2\right)\left(3x+2\right)\)
B = \(9x^2+30x+25+9x^2-30x+25-9x^2+4\)
B = \(9x^2+54\)