Leetcod string problem

#1

In this question ,I have problem in solving the example 2-5 given in the question.How to do it??

#2

Example 2:

Input:

num = “232”, target = 8 Output: [“23+2", "2+32”]

to get the output = 8 we can either do (23+2) or (2+32)

Example 3:

Input:

num = “105”, target = 5 Output: [“1*0+5”,“10-5”]

Example 4:

Input:

num =“00”, target = 0 Output: [“0+0”, “0-0”, “0*0”]

Example 5:

Input:

num = “3456237490”, target = 9191 Output: []

here we can’t get the target 9191 from “3456237490” so output is " "