-(1 . 1. 1.1.1.1.1.1) = -1

-1

-25

-9

-9

-5 . -5 = 25

25

- 2 .2 = -4

-0.5 . -0.5 = + 0.25

-0.1 . 0.1 = - 0.01

3 .3 =9

3 .3 =9

(-3 .-3) + 8 = 9+8 = 17

15 + ( -2 . -2 .-2 ) = 15 + -8 = 7

100 - ( -9 .-9 ) = 100 - 81 = 19

( -1 . -1 . -1 ) . 3 = -1 . 3 = -3

( 3 .3 ) : -4 = 9