Question 35437
t^4/u/ t^3/ u^2

[t^4/u]/[t^3/u^2]
Invert the denominator and multiply, as follows:

[t^4/u]*[u^2/t^3]
Cancel factors common to numerator and denominator
such as "y" and "t^3" to get:

= tu

Cheers,
Stan H.