А) -(7*8-20)+7*8 = -(56-20)+56=-56+20+56=20
б) +(99-5+8)-17=99-5+8-17=85
в) -(2*5+48)+23= -(10+48)+23=-10-48+23= -35
<span>г)-(32-74)-74 = -32+74-74 = -32
д)+(-120-9*9)-81 = -120 - 81-81 = 282
е)+(120-9в квадрате)+81</span> = 120-81+81 = 120
703-(184*4+360):8=566
184*4=736
736+360=1096
1096:8=137
703-137=566