14х⁴у 2х
---------- = ------------
49х³у² 7у
5х 5х 5
---------- = ------------ = -------------
х² +3х х*(х+3) х+3
х²-у² (х-у)*(х+у) х+у
----------- = --------------- = ---------
2х-2у 2*(х-у) 2
х²-16 (х-4)/(х+4) х+4
------------- = ---------------- = ------------
х²-8х+16 (х-4)² х-4
3х-1 х-9 3*(3х-1)+х*(х-9) 9х-3+х²-9х х²-3
----------- + ------- = --------------------------- = --------------- = -----------------
х² 3х 3х² 3х² 3х³