45х + 26х+17х-78х= 720+416+272-1248=160 118х-56х+35х+27х=354-168+105+81=372 16*30+14*12-600=48
45*16+26*16+17*16-78*16=160 118*3-56*3+35*3+27*3=372 83*2-35*2+16*2+36*2=200 16*5*6+14*2*6-100*6=48