x2-1 x-2 - 1 x-1	=	(x2-1)(x-1) - (x-2)(1) (x-2)(x-1)
	=	(x3 - x2 - x + 1) - (x - 2) x2 - 3x + 2
	=	x3 - x2 - 2x + 3 x2 - 3x + 2

Enter this as

x^3 - x^2 - 2*x + 3 x^2 - 3*x + 2

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