Question

Expression where the solution is 19

Answer 1

 any expression? You can do 15 x 2 + 8 / 2

Answer 2

We want something that equals 19 right? Anything can work here such as
10+9=19 <---we have our outcome as 19
If you want something more complex
1(10)+10-1=?
When you solve that it equals 19! :)