Replace special character by opposite character in Nth position string of a string in Power Query

[subjoin50]

I have multi-string text data in one column separated by unknown number of whitespaces. I want to replace ending special character on 3rd string from left by minus (-) if it ends with plus (+) and vice versa but rest of the string should remain unchanged. I tried split column and replace but couldn't figure it out. Here is an example of input and output column.

[Ahmedx · Accepted solution]

pls try this cod

[
    f = Text.Range([Input Column],
Text.PositionOfAny([Input Column],{"-","+"},Occurrence.Last),1),
to = Text.Replace([Input Column],f,if f ="-" then "+" else "-")][to]

[lbendlin]

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https://community.fabric.microsoft.com/t5/Community-Blog/How-to-provide-sample-data-in-the-Power-BI-...