Rút gọn biểu thức

Bài 1:2x (x-4)^2-(x+5).(x-2).(x+2)+2.(x+5)^2-(x-1)^2
Bài 2:(x+5)^2-4x.(2x+3)^2-(2x-1).(x+3).(x-3)x^2
Bài 3:-2x.(3x+2).(3x-2)+5.(x+2^2)-(x-1).(2x-1).(2x+1)
Bài 4:(7x-8).(7x-8)-10.(2x+3)^2+5x(3x-2)^-4x.(x-5)^2
Bài 5:(x^2-3).(x^2+3)-5x^2.(x+1)^2-(x^2-3x).(x^2-2x)
Bài 6:-6x^2.(x+5)^2-.(x-3)^2+(x^2-2).(2x^2+1)-4x^2(3x-4)^2
Bài 7:(5x-3y)^2-(4x+y).(4x-y)-(3x+2y)^2-7x(x-3y)
Bài 8:(-4x+2y).(-4x-2y)+(x-5y)^2-(3x+2y)^2-7x.(x-3y)
Bài 9:(x-4)^3-2x.(x-5)^2+(x-4).(x^2+4x+16)-(x-3)^3
Bài 10:(2x-3).(4x^2+6x+9)-(2x-1)^3+(3x+1).(9x^2-3x+1)
Bài 11:-4(x+3y)^3+(x-3y).(x+y).(x-y)-(2x-y)^3
Bài 12:(3x+y)^3-(5x-y).(25x^2+5xy+y^2)+(x+2y)^3
      LÀM NHANH GIÚP MÌNH VỚI Ạ:33