0

2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2+2-2 = 0

0

und. * 1 =1

BTW, any operation performed on undefined (or infinity as it should be) is undefined, so there is no point in carrying out any further operations.

2 / 10 + 3 / 10 + 5 / 10 -> 1

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