Mathematics
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    65+13= 53+20= 78-93= 92-24= 79-44= 94-24= 55+26= 61+14= 92+11= 82-57= 82-17= 50-16=
    64-58= 72-16= 71-28= 58-22= 84-34= 62-5= 79-10= 74-73= 62-39=
    75-42= 90-24= 85-21= 57-53= 76-74= 76-31= 66-21= 71-19= 92+13=
     34+24= 92-21= 88-48=
    -8/3
    39+13= 81-70= 87-80= 84-15= 89-44= 65-55= 73-39= 79-46= 39+18= 34+24= 92-21= 88-48=
    71-47= 88-53= 39+15= 45+13= 23+30= 44+30= 78+10= 56+22= 80-41=
    20-9= 80-6= 85-58= 78-29= 80-69= 82-3= 72-41= 91+13= 97-58=
     72-57= 72-17= 40-16=
    55+13= 43+20= 88-93= 92-24= 69-44= 84-24= 45+26= 51+14= 82+11= 72-57= 72-17= 40-16=
    94-78= 82-16= 81-28= 88-22= 74-34= 92-5= 89-10= 84-73= 52-39=
    65-42= 80-24= 75-21= 87-73= 86-94= 66-31= 56-21= 61-19= 82+13=
    500/1000*0.7219+500/100*1.3710
     29+24= 87-21= 93-48=
    34+13= 96-70= 92-80= 99-15= 94-44= 60-55= 68-39= 74-46= 34+18= 29+24= 87-21= 93-48=
    66-47= 93-53= 34+15= 50+13= 18+30= 39+30= 73+10= 51+22= 75-41=
    1.4855-1.1603
    15-9= 75-6= 80-58= 73-29= 75-69= 77-3= 67-41= 86+13= 92-58=
     67-57= 67-17= 35-16=
    800/1000*1.2476+200/1000*0.8113

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