3•[90:45+2x(69:13+10)]105:Repede va rogg

Explicație pas cu pas:
3•[90:45+2×(69:13+10)]+5:3
3•[90:45+2×(5,3+10))]+105:3
3•(90:45+2×6,3)+105:3
3•(2+12,6)+105:3
3•12,8+105:3
36,8+35
71,8