Code coach maths problem

Question

i made this sh*t but it feels like its real sh*t it works but there should be an easier way can someone explain me how to make this sh*t simpler?
https://code.sololearn.com/cVD4Q3zRrxk3/?ref=app

Answer 1

Unfortunately SoloLearn just get 1 input and You have requested input twice[line 17,18] and second input is set to null reference. I recommend you running your program in visual studio, and send error number to me.

Answer 2

It seems your code works fine
Just separate the 2 inputs with a return
Like

15
(2*3) (3*5) (4"16)

Answer 3

hossein B actually its working there is no errors and sololearn takes more than 1 input and i wrote in visial studio but thanks