2 2/5 = 12/5
6 1/15=91/15
1 1/7=8/7
5 5/7=40/7
5 1/16=81/16
2 2/5 :6 1/15 + 1 1/7- (5 5/7 - 5 1/16)=
=12/5 : 91/15 + 8/7 -(40/7 -81/16)=
=12/5 × 15/91 + 8/7 -40/7 +81/16=
=36/91 - 32/7 +81/16=
=(36-32*13)/91 +81/16=
=-380/91 +81/16=
=(-6080+7371)/1456=
=1291/1456