20:4*8+28:4*7= 14+12:6*8-45:5= 18+27:3*8-8*= 35:5-16:4+9*9=

20:4*8+28:4*7=5*8+7*7=40+49=8914+12:6*8-45:5=14+2*8-9=14+16-9=30-9=2118+27:3*8-8=18+9*8-8=18+72-8=90-8=8235:5-16:4+9*9=7-4+81=3+81=84