Please give me the answers to the two questions below

Question

1. var x = "5" + 2 + 3;
2. var x = 2 + 3 + "5";

Answer 1

1 -> 523
2 -> 55

Answer 2

hello
first : "5"+2 -> "52" + 3 -> "523"
string concat only

2nd : 2+3 -> 5 + "5" -> "55"
eval add & string concat