combined factoring (different patterns in 1)?

Question

I need help with these problems:

1. -p^7 + 2p^5 + 48p^3

2. 3m^5 - 21m^3 - 24m

3. 25w^3 - 10w^4 + w^5

4. -75wz^5 - 48w^3z

Answer 1

1. . -p^7 + 2p^5 + 48p^3 = p^3 ( -p^4 +2p^2 + 48)

2. 3m^5 - 21m^3 - 24m= 3m( m^4 -7m^2 -8)=3m( m^2 -8)(m^2 +1)

3. 25w^3 - 10w^4 + w^5 = w^3( 25 - 10w + w^2) =w^3 ( 5-w)^2

4. -75wz^5 - 48w^3z = -wz( 75 z^4 + 48 w^2 ) = -3wz( 25z^4 + 16w^2) .