e, -7568 - ( 39 - 7568 ) = -7568 - 39 + 7569 = ( - 7568 + 7568 ) - 39 = 0 - 39 = -39
f, 44 + 45 + 46 + 7 - 14 - 15 - 16 - 17
= ( 44 - 14 ) + ( 45 - 15 ) + ( 46 - 16 ) + ( 7 - 17 )
= 30 + 30 + 30 + ( - 10 ) = 90 - 10 = 80
g, ( 37 - 575 ) - ( 475 - 63 ) = 37 - 575 - 475 + 63
= ( 37 + 63 ) - ( 475 + 575 )
= 100 - 1050 = - ( 1050 - 100 ) = -950
h, -8715 + ( 1345 + 8715 )
= -8715 + 1345 + 8715 = ( -8715 + 8715 ) + 1345 = 0 + 1345 = 1345
i, ( 35 - 815 ) - ( 795 - 65 )
= 35 - 815 - 795 + 65
= ( 35 + 65 ) - ( 815 + 795 ) = 100 - 1610 = - ( 1610 - 100 ) = -1510
