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It's easy to read the steps from Rubi, but kind of tired to copy it out of as $\LaTeX$. That's what now I do:

Int[x Sin[x], x]//Steps

For example,click one step, then paste it to .nb, then //TeXForm to get the TeX code. (kind of monkey job)

I've tried FullForm, get nothing, // Trace gives back a lot of things, which seems a bit hard for me to pick out what I want. So I want a "automatical" way to do this.

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  • $\begingroup$ Hi. I found small problem trying to add your function to my report. Since all integrals I use come from lists, and you have SetAttributes[IntWithStepsOfTeXForm, {HoldFirst}]; then when I pass the integral to your function, it does not work. Here is an example. lst = {{Log[1 + x], x}}; result = IntWithStepsOfTeXForm[ Int[lst[[1, 1]], lst[[1, 2]]] ] ; And now the result does not work. Screen shot !Mathematica graphics $\endgroup$
    – Nasser
    Commented May 9, 2020 at 23:46
  • $\begingroup$ fyi, I posted separate question on this here mathematica.stackexchange.com/questions/221547/… I could not find solution myself. $\endgroup$
    – Nasser
    Commented May 10, 2020 at 1:41
  • $\begingroup$ @Nasser IntWithStepsOfTeXForm[Int[#, x]] & /@ {Sin[x], Cos[x]/x^2, Sin[x]/x^2} // MaTeX can work. $\endgroup$
    – AsukaMinato
    Commented May 10, 2020 at 4:05

1 Answer 1

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A better version is here:

https://mathematica.stackexchange.com/a/221559/68689

I found this option:

RubiPrintInformation -> False

And then write this:

SetAttributes[IntWithStepsOfTeXForm, {HoldFirst}];
IntWithStepsOfTeXForm[j_] := 
 With[{TeX2Str = Convert`TeX`ExpressionToTeX},
  Steps[j, RubiPrintInformation -> False] //
         Flatten //
        Most //
       Select[Head@# =!= RubiRule &] //
      # /. RubiIntermediateResult[x_] -> x & //
     (*ToString@*TeXForm is OK*)
     Map["=&" <> (TeX2Str[HoldForm @@ #]) <> "\\\\" &] //
    # /. {a___} -> {
        "\\begin{aligned}",
        TeX2Str@HoldForm@j,
        a,
        "\\end{aligned}"} & // StringRiffle
  ]

This function returns a string.

Usage:

Or use Print and then copy the result to clipboard for following use.

enter image description here

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