Please help me on these ones guys. I'm not as smart as you! :P

Simplify the following expressions and express the result with positive indices. All letters given represent non-zero numbers.

1.

2.

3.

4.

5.

6.

7.

8.

9.

Find the values of the following:

1.

2.

3.

4.

5.

Simplify:

1.

Express the following in their simplest form:

1.

2.

3.

4.

5. [tex]\sqrt[4]{243c^8d^3}

Arrange the following in descending order:

1. , ,

Simplify and express with positive indices:

1.

2.

3.

Thanks for your help guys!!