What is the approximate length of RQ?

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Write the expression as a constant , a single trigonometric function, or a power of a trigonometric function. sin x cos x/ tan x

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤