k^{2} + k  42 k^{2} 
k  30
1 1 1k 1 1 k1
The denominators are:
1 and 1k 1 and k1
This means you need to get the denominator to be:
1k k1
In case you need help once you have the denominators. I will leave the original outside of parenthesis and the mulitplier inside. Remember you have to multiply both the top and bottom of a fraction if you are altering it in any way.
k^{2} (1k) + k (1k)  42 k^{2} (k1) 
k (k1)  30
1 (1k) 1 (1k) 1k 1 (k1) 1 (k1) k1
This gives you:
k^{2}  k^{3} + k  k^{2}  42
k^{3}  k^{2}  k^{2}  k  30
1k k1
Simplify further and put into correct order:
k^{3} + k  42 k^{3} 2k^{2}  k  30
1k k1
10/3/2012

Nicole C.
Comments
I interpreted the problem differently than Danielle (above). I saw two totally different problems, she saw one. I hope between the two of us you were able to get the information you needed.