HOW we get answer 29 from 1,2,3,4 numbers using at once

The process is by trial and error.

The following operations will produce 29 as an answer. The order of operation rules must be applied.

`(2)^[4+1]-3` 

`=(2)^5-3` 

`=32-3`

`=29`

The following operations will also produce 29 as and answer. The order of operation rules must be applied.

`(1+2)^3+sqrt4`

`=(3)^3+sqrt4`

`=27+sqrt4`

`=27+2`

`=29`