Răspuns:
42
Explicație pas cu pas:
https://www.wolframalpha.com/input?i=72%2F9%2B%28100%2F10%2F5*8%2F4%2B30%29
72:9+(100:10x8:4+30)=
8+(10x2+30)=
8+(20+30)=
8+50=
58