5s/(s^2-t^2) - s/(s-t)

Answer 1

using a common denominator, we have

5s/(s^2-t^2) - s(s+t)/(s^2-t^2)
(5s-s(s+t))/(s^2-t^2)
s(5-s-t)/(s^2-t^2)

Answer 2

thanks