_:50=6, 59-__=42, __+75=160, 4*__=80, __+210=330, __:40=120, 33+__=220, __*6=480
300:50=6, 59-17=42, 85+75=160, 4*20=80 120+210=330 4800:40=120 33+187=220 80*6=480