Question 1199223


{{{root(5,(5sqrt(700)-sqrt(7))^6)}}}

={{{root(5,(5*10sqrt(7)-sqrt(7))^6)}}}

={{{root(5,(50sqrt(7)-sqrt(7))^6)}}}

={{{root(5,(49sqrt(7))^6)}}}

={{{root(5,4747561509943)}}}

={{{343}}}