How to do string analysis

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1

Hi all,

I started learning ELK stack, These are some confusion.

how to analysis string in ELK stack.

I have data which started with A1, A2, A3, A4, A5 something like that.

For Reference

A1,12,1.2.3,AB3CD
A2,12,1.2.3,30
A1,1,1.2.3,A3BCD
A2,1,1.2.3,3
A1,2,1.2.3,AB3DC
A2,2,1.2.3,0.1
A1,11,1.2.3,3ABCD
A2,11,1.2.3,3.3
A3,11,,
A4,11,,
A3,21,,
A4,12,,

Now what I want I would like to use some mathematical formula on it.

(A5 -(A1 + A2 + A3))/A4 = This value I need

How to do that I don't know, I spent some time on the scripted field but they have some limitation on the string so back to square one.

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