\(9^3.81=9^3.9^2=9^5\)
\(10^5.1000=10^5.10^3=10^8\)
\(\left(-2\right)^7.64=\left(-2\right)^7.\left(-2\right)^6=\left(-2\right)^{13}\)
\(\left(-3\right)^7.81=\left(-3\right)^7.\left(-3\right)^4=\left(-3\right)^{11}\)
\(\left(-5\right)^3.25=\left(-5\right)^3.\left(-5\right)^2=\left(-5\right)^5\)
\(\left(-7\right)^7.49=\left(-7\right)^7.\left(-7\right)^2=\left(-7\right)^9\)
\(\left(-10\right)^{15}.100=\left(-10\right)^{15}.\left(-10\right)^2=\left(-10\right)^{17}\)
`9^3 .81 = 9^3 .9^2 = 9^(3+2) = 9^5`
`10^5 . 1000 = 10^5 .10^3 =10^(5+3) = 10^8`
`(-2)^7 . 64 = (-2)^7 . (-2)^6 = (-2)^(7+6) = (-2)^13`
`(-3)^7 .18 = (-3)^7 . (-3)^4 = (-3)^(7+4) = (-3)^11`
`(-5)^3 . 25 = (-5)^3 .(-5)^2 = (-5)^(2+3) = (-5)^5`
`(-7)^7 . 49 = (-7)^7 . (-7)^2 = (-7)^(7+2) = (-7)^9`
`(-10)^15 .100 = (-10)^15 . (-10)^2 = (-10)^(12+5) = (-10)^17`