6+8=       7+5=      15-8=     17+3=     13-9=    

60+8=    34+7=     32-4=     56+8=     56-30=    

4 × 1 =        3 × 2 =         6 × 2 =        1 × 8 =

4 + 1 =          3 + 2 =           6 + 2 =          1 + 8 =

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