Помогите plz (4x-1)²-(2x-3)(6x+5)=4(x-2)²+16x

(4x-1)²-(2x-3)(6x+5)==16x²-8x+1-(12x²+10x-18x-15)==16x²-8x+1-12x²+8x+15==4x²-16x+16+16x=4(x²-4x+4)+16x=4(x-2)²+16x