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13.Calculați:
c)18×[1+3^7×3^53+7^84:7^14+(5^4)^20]:(13^0+3^60+7^70+5^80)​


Răspuns :

18•[1+3^7•3^53+7^84:7^14+(5^4)^20]:(13^0+3^60+7^70+5^80=

18•[1+3^7+53+7^84-14+5^4•20]:(1+3^60+7^70+5^80)=

18•[1+3^60+7^70+5^80]:(1+3^60+7^70+5^80)=

18•1=

18