[(6x5¹⁰-5¹⁰)³:25¹⁵-47⁰]x10³=
[(5×5¹⁰)³÷5³⁰-1]×10³=
[(5¹¹)³÷5³⁰-1]×10³=
(5³³÷5³⁰-1)×10³=
(5³-1)×10³=
50³-10³=
(5×10)³-10³=
5³×10³-10³=
5³×2³×(5³-1)=
125×8×124=
=124000
