Odpowiedź:
2 1/7*2,1-(2/3)2+7,4:37/40
2 1/7*2 1/10-(2/3)2+7 4/10*40/37
15/7*21/10-2/3*2/3+74/10*40/37
3/1*3/2-4/9+74/1*4/37
9/2-4/9+296/37
81/19-8/19+8
73/19+8
3 16/19+8
11 16/19
