Slangmgh shares:
 
 
1. Create notepad named 'Calc'
2. Create folder named 'Result', set type to TEXT
3. Create rule for folder 'Result'
++:!:eval(ITT):
4. Add folder 'Result' as column to notepad 'Calc'
 
5. now write expression in notepad 'Calc', you will get result at column
 
 
 
 
ps: thread challenge --> how to add regex to this to only turn portion of text between "[" and "]"  into calculator ?