No.
It is 1 over r squared, or r to the negative second power.
-1 -1 ''-5 ''-6 _ + _ = _ = -1 ''6 6'' ''''6 (ignore the all the apostrophes, they are for place holding)
Negative one fourth. -1/4. And. 1/-4 are the same, which number has the negative does not matter
-2-6 = -0.015625 (or -1/64)
the answer is 1 over 36
(-1/2)6=1/64
That is the definition of negative powers.
negative 1 over 8
Expressed as a proper fraction in its simplest form, 1/6 - 1/3 = -1/6 or negative one sixth.
Negative 1 over 2