Simplify the problem

4^3 and 2^6

Four to the power of three is 1024

And 2 to the power of 6 is 128

1. LCM of 15x^7 and 45x^7

2. Marla can shovel the driveway in 60min and Bill can do it in 45min how long would it take them to do the job together?

3. Divide and simplify:

x^2-4/x divided by x+2/x+8

4. add and simplify:

5/49z^3 + 1/35z^2

5. simplify by removing factors of 1

y^2-5y+6/y^2+3y-18

6. divide and simplify:

h+1/h-3 divided by 6h+6/h-1 (simplify answer)

7. add and simplify:

5/v-9 + 5/v+9