Here are the solutions:

1. 4.0 + -6.0i
2. 9.0 + 10.0i
3. 4.0 + 3.0i
4. -4.0 + -5.0i
5. 1.0 + 0.0i

Here are the solutions:

1. 3*x**2
2. 2*x
3. 5*x**4 + 6*x
4. 5*x**4 + 6*x
5. 5*x**4 + 6*x

Here are the solutions:

1. 4*x**3
2. 3*x**2
3. 5*x**4 + 6*x
4. 4*x**3
5. 4*x**3