Rút gọn biểu thức

----- Nội dung dịch tự động từ ảnh -----
5) (x+2).(x-3)+x(x+1)
7) x(1-x)+(x+1).(x-2)
9) 2x(x-3)+(x-2).(5-2x)
11) 3x(4x-3)-(2x−1).(6x+5)
13) 3.(x−1).(x−2) — x.(3x+1).(1− x)
-
15) −3.(x+4).(x−7)+7.(x-5).(x-1)
6) (2x-1).(x+1)+x(2x-5)
8) (3x-1).(x+4)-3x(x−1)
10) 6x(2x+3)-(3x-1).(4x+1)
12) (2-5x).(3-4x)+x(2x+23)
14) -4x(x+3)(x-4)-3x(x²-x+1)
16) −2(x−3).(2x² +1)+x(4x+1)(x+2)