(55.08:1.8-4.056:0.52)*6.5-93.78=
1) 55,08:1,8=30.6 2) 4,056:0,52=7,8 3) 30,6-7,8=22,8 4) 22,8*6,5=148,2 5) 148,2-93,78=54,42