(4+8):4+21:(7.3)=
40:(15+5).(10:5)=
16:2+(7-5).7=
(46-16+5):7=
(35-14+21):7=
16-(8+4:2)=
16-(8+4):2=
(16-8+4):2=
(100-100:5).6=
(80.3+60):10=