37+(-50)+22+13+(-28)=37-50+22+13-28=72-78=-6
-1,32+2,41+3,77+(-4,68)+0,59=-1,32+2,41+3,77-4,68+0,59=6,77-6=0,77
37+(-50)+22+13+(-28)=37-50+22+13-28=72-78=-6
-1,32+2,41+3,77+(-4,68)+0,59=-1,32+2,41+3,77-4,68+0,59=6,77-6=0,77