Homework help- Math Problems- Factoring- HELP QUICK! PLZ!?

[Christy H]

I need help with these math problems...I also have another question going that I could use help on too thanks...just show me each step to work these problems out and how you got the answer...send it to my email...dorkalicious_430@yahoo.com THANKS!

^= exponent (the the power)

Find the least commone multiple:

1)10v^2+30v, 5v^2+35v+60
2)9x^3-9x^2-18x, 6x^5-24x^4+24x^3

Add and simplify:
1)4-a a+1
----- + ------
25-a^2 a-5

2)x+2 3-x
----- + ------
x-7 49-x^2

Multiply and then if possible simplify by factoring:
1) Under a radical (square root sign) 2x^2y multiplied by Under a radical 4xy^2

2) Under a radical 18 multiplied Under a radical 18

3) Under a radical x-9 multiplied by Under a radical x-9

4) Under a radical 12x^3y^2 multiplied by Under a radical 8xy