with(Student:-Basics); simplify((b - 1)/(b + 2 - (b^2 + 2)/(b - (b - 2)/(b + 1)))); b - 1 This is correct, but I want to see the step-by-step solution. P.D. I try the ExpandSteps command already but the result doesn't give me the solution. Please, help me. Thanks in advance