I am getting extremely frustrated over these questions please help me help me !!!!!! I want step by step which will make me understand.

Q.Express as Partial Fractions:

1- 2x - 7 / ( x - 5 ) ^ 2

2- x^2 + 4x + 7 / ( x + 3 ) ^3

3- -2x^2 + 13 / ( 2x + 1 )( x^2 + 2x + 7 )

10pts. FOR THE *BEST* ANSWER

I know how to do it! but i don't know in these specific questions.