(b) 7 ( 4 + 9) = 7 ( ____) + 7 (____ )
(c) (-4) + ( -7) = ( -7) + (___)
(d) 6 ( 7 – 4) = 6( ___) _ (____) × 4
(e) (-2) [6 × ( -5)] = [ ( ___) ×( 6) ] × (-5)