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\(74^{30}=\left(74^2\right)^{15}=...6\)
\(49^{31}=49\cdot\left(49^2\right)^{15}=49\cdot...1=...9\)
\(87^{32}=\left(87^4\right)^8=...1\)
\(58^{33}=58\cdot\left(58^4\right)^8=58\cdot...6=...8\)
\(23^{35}=\left(23^4\right)^8\cdot23^3=...1\cdot7=...7\)
\(74^{30}=74^{28}.74^2=74^{4n}.74^2=\left(.....1\right).\left(.....6\right)=\left(.....6\right)\)
\(49^{31}=\left(.....1\right)\)
\(87^{32}=87^{4n}=\left(.....1\right)\)
\(58^{33}=58^{32}.58=58^{4n}.58=\cdot\left(.....6\right).58=\left(.....8\right)\)
\(23^{35}=23^{32}.23^3=23^{4n}.\left(.....7\right)=\left(.....1\right).\left(.....7\right)=\left(.....7\right)\)
\(74^{30}=\left(...4^2\right)^{15}=\left(...6\right)^{15}=...6\)
\(49^{31}=\left(49^2\right)^{15}.49=\left(...1\right)^{15}.\left(...9\right)=\left(...1\right).\left(...9\right)=...9\)
\(87^{32}=\left(87^4\right)^8=\left(...1\right)^8=...1\)
\(58^{33}=\left(58^4\right)^8.58=\left(...6\right)^8.\left(...8\right)=\left(...6\right).\left(...8\right)=...8\)
\(23^{35}=\left(23^4\right)^8.23^3=\left(...1\right)^8.\left(...3^3\right)=\left(...1\right).\left(...7\right)=...7\)
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