-25,5-3,4+7,28+25,5+34:10-0,728*10+2,85

-25.5-3.4+7.28+25.5+34:10-0.728*10+2.85=2.8534:10=3.40.728*10=7.28-25.5-3.4=-28.9-28.9+7.28=-21.62-21.62+25.5=3.883.88+3.4=7.287.28-7.28=00+2.85=2.85