75,15:2,5 -(18 2/7-7 3/35)* 2,5+ 40,7 1/6+2/3*(0.21:0.2-1.2)

Question

75,15:2,5 -(18 2/7-7 3/35)* 2,5+ 40,7
1/6+2/3*(0.21:0.2-1.2)

Answer 1

75,15:2,5-(18 2/7-73/35)*2,5+40,7=30,06-(128/7-248/35)*2,5+40,7=30,06-(640-248)/35*2,5+40,7=30,06-392*2,5/35+40,7=30,6-28+40,7=43,3