Hello, I have (%i1) listarith: false$ (%i2) x: [1,2]+p*[3,4]; (%o2) [3, 4] p + [1, 2] When I do now (%i3) ev(x, listarith: true); (%o3) [3 p + 1, 4 p + 2] is this evaluation or simplification ? Can someone please explain the notation? Thanks Volker van Nek