Question: how to confine large expression in a nice simple form in maple?

 

I am trying to solve 4x4 determinants, but there is many determinants in my problem, I want to solve it in maple. Maple gives the answer but its expression is large. how to confine large expression in a nice simple form in maple? Here is an example:

with(LinearAlgebra):

A:=Matrix([[phi,conjugate(psi),chi,conjugate(rho)],[psi,-conjugate(phi),rho,-conjugate(chi)],[lambda1*phi,conjugate(lambda1)*conjugate(psi),lambda2*chi,conjugate(lambda2)*conjugate(rho)],[lambda1*psi,-conjugate(lambda1)*conjugate(phi),lambda2*rho,-conjugate(lambda2)*conjugate(chi)]]);


 

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