Question 443721
Cubed root of 40 + 2 * cubed root of 135 - 5 * cubed root 320
= {{{root(3,8*5)+2*root(3,27*5)-5*root(3,64*5)}}}
={{{2root(3,5)+6*root(3,5)-20*root(3,5)}}}
={{{-12*root(3,5)}}}
.
Ed