Tính: a) (8x - 5)(2x + 3) + (2x - 5)^2; b) (5 - 2x)(5 + 2x) + (3 - 2x)^2

Tính:
a.(8x-5)(2x+3)+(2x-5)^2
b.(5-2x)(5+2x)+(3-2x)^2