(My english is bad, sorry)

well, i'll try to write this in the best way i can,

first, this is what i got:

| x t 5 w |

| a a b b |

| z 2 3 2 |

| 2 3 4 5 |

and its equal to = |-2|

and, another one:

| x b 2 z |

| t (-c) 3 2 |

| 5 c 4 3 |

| w (2p) 5 2 |

and its equal = |8|

then, there's a third one, i need the determinant of this one :

| x t 5 w |

| (a+2b+z) (a-2c+2) (b+2c+3) (b+4p+2) |

| 2 3 4 5 |

| 2 2 3 2 |

and its equal to |18 |

can someone help me? i really dont understand i need the steps or something like that, thanks in advance and sorry for my awful english.