Question Number 102819 by aurpeyz last updated on 11/Jul/20

Commented byRasheed.Sindhi last updated on 11/Jul/20

Perhaps he doesn′t know to use the keyboard of this app.

Commented byJDamian last updated on 11/Jul/20

Why should he learn if there are others who do for him?

Commented byaurpeyz last updated on 11/Jul/20

i dont know how to use that well

Commented byprakash jain last updated on 11/Jul/20

This is a link to tutorial to watch. short but should give you a start. https://youtu.be/vpPoeVQ49Lo also please recheck your question. It does seem to get a nice closed form solution.