Question 817304
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Hi
{{{((6r^2-7r-3)(cross(r^2-1))(2r^2-r-3))/((cross(r^2-1))(4r^2-12r+19)(3r^2-2r-1))}}}
{{{((6r^2-7r-3)(2r^2-r-3))/(4r^2-12r+19)(3r^2-2r-1))}}}
{{{((2r-3)(cross(3r+1))(2r-3)(r+1))/(4r^2-12r+19)cross((3r+1))(r-1))}}}
{{{((r+1)(2r-3)^2)/(r-1)(4r^2-12r+19)))}}}