regex - How do I apply a formula to a range without applying said formula to every cell? -


i'm trying apply formula without having add formula data each , every cell - in other words, need cells receiving formula untouched until data.

i searching around , looked arrayformula work doesn't seem doing when apply it.

for example, want apply formula cell range: =split(e2, ",")). each cell in e column needs split 2 two adjacent cells next based on it's comma. when try apply =arrayformula(split(e2:e99, ",")) cell add gets formula.

i think want may array_constrain example can @ present offer 2 formulae (one each side of comma): 

=array_constrain(arrayformula(left(e2:e,find(",",e2:e)-1)),match("xxx",e:e)-1,1)    =array_constrain(arrayformula(mid(e2:e,find(",",e2:e)+1,len(e2:e))),match("xxx",e:e)-1,1)

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