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Show "step-by-step" button in W|A Pro?

GROUPS:

I just purchased a Pro plan because I wanted to see the step-by-step solution to

"integral of (z^2 * (1/sqrt(2*pi)) * exp(-z^2/2)) from negative infinity to infinity"

which includes an integration by parts. However, I don't see a "Step-by-step" button even after logging out and back in a couple of times. All I get is the answer (1). Any ideas?

POSTED BY: Ron Baakkonen
Answer
26 days ago

The indefinite integral involves the error function Erf, a special function. The step-by-step approach may be limited to elementary integrals.

POSTED BY: Gianluca Gorni
Answer
26 days ago

I've sent the Wolfram|Alpha team a note about your suggestion by filling out the Feedback form at the bottom of the Wolfram|Alpha page with your example.

Right now, it doesn't look like step-by-step integration handles special functions like erf.

POSTED BY: Sean Clarke
Answer
26 days ago

Group Abstract Group Abstract