Currently working on a math problem that requires maple to be solved.

The math problem is

The volume V pf the paralellpiped is given by the following scalar triple product.

V = |(P5->P8 X P5->P6) * P5->P1|
P1 = ( [-17/12] , [11/36], [-65/36])
P5 = ([-11/12], [-7/36], [-47/36])
P6 = ([-2/3],[-1/9],[-8/9])
P8 = ([-5/4],[-1/12],[-17/12])`

answer should be 4 cubic units.

Several times trying it several different ways gives errors or nothing.