Question

Calculati:(2 ^{17} *2 ^{23} +5 ^{31} :5 ^{15}):[25 ^{8}+(2 ^{2}) ^{20}] 

Answer 1

$(2 ^{17} *2 ^{23} +5 ^{31} :5 ^{15}):[25 ^{8}+(2 ^{2}) ^{20}] =(2^{17+23}+5^{31-15}):(25^8+2^4^0)= \\ =(2^4^0+5^1^6):[(5^2)^8+2^4^0]=(2^4^0+5^1^6):(5^1^6+2^4^0)=1$