2х х+3 96 2х х+3 96
-------- - ------------ * ----------- = -------- - ------------ * ----------- =
х-4 3х+12 х²+3х х-4 3(х+4) х(х+3)
2х 32 2х²-32 2*(х-4)(х+4) 2х-8 8
= --------- - ------------ = ------------ = ------------------ = -------------- = 2 - ------
х-4 (х+4)*х (х+4)*х (х+4)*х х х