Non Linear Equations without the Matrix

[roadrunner]

Han,

What am I doing wrong? When I solve this problem in Xcas I get:

[[0,30,0,0],[45,0,0,0],[0,0,45/2,0],[15,10,15/2,75/2]]

When I solve this problem on the prime (CAS approx) I get:

{[(-y+10)/(2*z-15),(-2*z^2-6*l+45*z)/(2*l*z-15*l),(-y*z+2*l)/(2*l*z-15*l),(-3*y^2-16*l+90*y)/(2*l*z-15*l)],[(-y+10)/(2*z-15),(-2*z^2-6*l+45*z)/(2*l*z-15*l),(-y*z+2*l)/(2*l*z-15*l),(-3*y^2-16*l+90*y)/(2*l*z-15*l)]}

On the Prime (CAS exact) I get empty brackets [].

It's the same on the simulator and handheld.

       

-road