-----maxima-bounces at math.utexas.edu wrote: ----- > is there some way of making Maxima "see" that >?? ?cos(3*acos(x)) = 4x^3 - 3x? (%i8) ratsimp(exponentialize(logarc(cos(3*acos(x))))); (%o8) 4*x^3-3*x --Barton