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Leta Davis β
A calculator only costs a few bucks. As a matter of fact, most modern operating systems include a free calculator app.
14 + 14 + 7 + 7 = 42
7+ 14 =21
-7
14 + 7 = 21
?+14=7+7 ?=0 7+7=14
-14
14
6 + 13 + 2 + 12 + 7 + 14 = 54
14 x 7 = 28 + 70 = 98
(-10) + (-7) + (-14) = -31
7
-4-7+(-14) = -4-7-14 = -25
2 + 11= 13 13 +7 = 20 20 + 14 =34 so: 2 + 11 + 7 +14 = 34