what is the result of 6+4=, 10, 12, 13, what is the result of 10+7=, 14, 17, 9, what is the result of 20+6=, 20, 26, 21, what is the result of 30+4=, 34, 32, 30, what is the result of 40+3=, 43, 40, 39, what is the result of 10+10=, 20, 21, 12, what is the result of 30+9= , 39, 32, 33, what is the result of 40+1=, 41, 42, 44.

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