about copyright law ?

I wonder if I include a music file (mp3) in my WordPress post, will the following situation against a copyright law ?

Case-1.
I have a cd which contain a specific music from movie soundtrack. Me and my friends rearrange the music with a MIDI sequencer, and then record this rearranged music where the resulting format is mp3 file.

Case-2.
I know a worship song which sang by many singers. I rearrange the music (minus one) and then record my own singer (either me or my friend) sing that song to mp3 format.

Case-3.
I know a song which sang for the first time by a specific singer. Say for example “Beat it” sung by Michael Jackson. I rearranged the music as close as possible to the original one (so, it’s a minus one music), get the vocal only of MJ sing that song then record his vocal with the rearranged music to mp3.

Case-4
Almost the same case with No.3 but this one is without MJ vocal. This time either it’s just the “Beat It” rearranged music (minus one) or me or my friend sing the lyric with that minus one rearranged music in mp3 format.

Case-6.
I have a karaoke music (minus one) of the “Beat it” song. Me and my friends sing the song along that already made karaoke music (by someone else, God knows who he/she is) while record it to mp3 file.

Case-7
From Google Image Result, I copy a picture of a movie (where one of the OST of this movie we rearranged it in No. 1). Crop/edit the picture, import to my WordPress media file, then display it to my post.

All those 7 cases above will be my situation.
Anyone please tell me whether all those 7 are legal or not ?

Any kind of help would be greatly appreciated.
Thank you in advanced and I’m sorry for my broken English but I hope my reader “catch” what I mean.

regards.