1+5+5 Square +5 third power +.+5 99th power +5 100th power 1+5+5 Squared +5 third power +.+5 99th power +5 100th power

1+5+5 Square +5 third power +.+5 99th power +5 100th power 1+5+5 Squared +5 third power +.+5 99th power +5 100th power

1+5+5 Square +5 third power +.+5 99th power +5 100th power
=(1-5^101)/(1-5)
=(5^101-1)/4

1+5+5 Squared +5 third power +.+5 99th power +5 100th power
=(1-5^101)/(1-5)
=(5^101-1)/4

100 To the second power -99 to the second power +98 to the second power...+2 to the second power -1 to the second power

100^2-99^2+98^2-87^2+...+2^2-1^2
=(100+99)(100-99)+(98+97)(98-97)+...+(2+1)(2-1)
=100+99+98+97+…… +3+2+1
=(1/2)*100*101
=5050