5^3*6 + 5^4*7 = 5^3(6+5*7) = 5^3(6+35) =5^3*41 = 125*41 = 5125
5³ x 6 + 5⁴ x 7 = 5 125
= 5³ x ( 6 + 5 x 7 ) =
= 125 x ( 6 + 35 ) =
= 125 x 41 =
= 5 125
