It would be more useful if it could make me a sandwich or feed the cat.This particular one doesn't seem to do anything, it just tests for ability to use negative exponents and zero as an exponent. Typically in such tests there'd be some convolution regarding factorization of cubes or similar (a^3+b^3 or a^3-b^3) along with second degree polynomial factorization.
It's another reason I didn't like it
Basically it asks to you write that it is equal to a^3-[1/(1+a)^2]+4[2a/(2b+a)]+1 and then use the given values.