three - one + two, seven - four + three, five - ten minus five, six - eight minus two, eight - five plus three, ten - five plus five, nine - ten minus one, one - ten minus nine, twelve - six plus six, fifteen - eight plus seven, 2 - nine minus seven, 8 - twelve minus four, eleven - fifteen minus four, fourteen - eleven plus three, sixteen - ten plus six, seventeen - nine plus eight, nineteen - eleven plus eight, twenty two - ten plus eleven, twenty - ten plus ten, twenty four - ten plus fourteen , twenty eight - fourteen plus fourteen, thirty - fifteen plus fifteen, forty five - twenty plus fifteen, fifty  - twenty plus twenty, fifty five - sixty minus five, 4 - two multiplied by two, 16 - four multiplied by four, thirty six - nine multiplied by four, eighteen - thirty six divided by four, 3 - nine divided by three,

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