(-1/6x^2y)xxy^2x(-3xyz),3x(x-1)-5x(x+2),(3x+2)(2x-3),因式分解

(-1/6x^2y)xxy^2x(-3xyz),
=1/2x^4y³z
3x(x-1)-5x(x+2),
=3x²-3x-5x²-10x
=-2x²-13x
(3x+2)(2x-3)
=6x²-9x+4x-6
=6x²-5x-6