Answer :

Xedger
I hope I'm right with this answer
${teks-lihat-gambar} Xedger
Hello There!

1 + 3 + 5 = 9
72/9 = 8
8 x 1 = 8
8 x 3 = 24
6 x 5 = 40

The answer is 8:24:40

Hope This Helps You!
Good Luck :) 

- Hannah ❤