Hah, okay. I've got one hour to turn this in...

And I'm terrible at this stuff..If someone wouldn't mind walking me through these, I'd be super grateful.

1.)

https://webwork.math.wisc.edu/webwor...b48def6941.png

2.)https://webwork.math.wisc.edu/webwor...e8997006d1.png

3.)https://webwork.math.wisc.edu/webwor...35ff8db3b1.png

With this one, I know i need to add up the nominator and denominator by finding a common denominator for each..then to take:

[(t^2-s^2)/(s^(2)t^(2))]/[(t+s)/(st)]

But then I'm stuck.

Please and thanks!!