Answer: Simplified expression- 
Step-by-step explanation: You get the product by simplifying it.
I tried my best, I hope this it what you were looking for:)
Answer:
3 and 21/22
Step-by-step explanation:
You convert the fractions so they have the same number as the denominator and then subtract them.
Answer:
pythagurom theorum
Step-by-step explanation:

Answer:
5
Step-by-step explanation:
We desire to evaluate the fraction:
when k=3.
This is a simple substitution, so what is required is
- Replace k with the given number
- Simplify the resulting expression
Therefore, when k=3

You can try the same for any value of k.