= 1/5 - 1/3 + 1/ 10

= ( 6- 10+3) /30

=- 1 minute 30 copies

(0 in -65438+2)-(0 in-65438+3)-(0 in-65438+4)-(0 in-65438+6).

= - 1/2 + 1/3 + 1/4 + 1/6

= (-6+4+3+2) / 12

= 65438+3/02

= 0 in 65438+4.

2 and 3 times1(3 of-7)

= 7/3 x 3/7

= - 1