Вычислите сумму,применяя законы сложения

Пример:17+(-9)+(-17)+(-2) = 17+(-17)+(-9)+(-2) = 0+(-11) = -11.

( -13) + 29+ (-9) + 13 =

(-3)+(-28)+28+7 =

-5+(5+(-99)) =

(-48+91)+(-91) =

(-34+59)+34 =

(47+(-91))+91 =

(-4)+(-2)+22+14 =

-28+(18+29) =

-10+(-10+30) =
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