64:8+9x(400-396):6-2=8+9x4:6-2=8+36:6-2=8+6-2=14+2=16
28x7+9:9x8-20x5:10=196+1x8-100:10=196+8-10=204-10=194
4x7-8:4:2+4x(7x4-8:8)=28-2:2+4x(28-1)=28-1+4x27=28-1+108=27+108=135
