a) (100 - 97)2 + 720 : 718 + 20130
= 32 + 72 + 1
= 9 + 49 + 1
= 59
b) 37 . 29 +29 . 62 + 29
= 29 . ( 37 + 62 ) + 29
= 29 . 99 + 29
= 2871 + 29 = 2900
c) ( -2013 ) + 1908 + 2013 + ( -908 )
= ( -105 ) + 2013 - 908
= 1908 - 908 = 1000
d) (-35 ) - ( 12 - 17 )
= ( -35 ) - ( -5 )
= - (35 - 5)
= -30