Question 921176

{{{(2a-5)^3}}}

={{{(2a-5)(2a-5)(2a-5)}}}

={{{(4a^2-10a-10a+25)(2a-5)}}}

={{{(4a^2-20a+25)(2a-5)}}}

={{{8a^3-40a^2+50a-20a^2+100a-125)}}}

={{{8a^3-60a^2+150a-125)}}}