is the answer to r2/3r-1/r-1/2

Question

r_7/6/r₁

Answer 1

But isn't r^7/6 = r^6/6*r^1/6 =
r*r^1/6 and the r cancels in the top and bottom.

Answer 2

i'm sorry i'm still confused

r_1/6/r ?

Answer 3

No.
r^7/6/r = r^6/6*r^1/6/r = r^1/6

Answer 4

ok got it now thank you