What am i doing wrong again

my_mc.loadMovie(directory add Math.ceil(Math.random()*footers) add “.jpg”, _root.holder);

Error Scene=Scene 1, layer=Layer 2, frame=1:Line 10: ‘)’ or ‘,’ expected
my_mc.load(directory add Math.ceil(Math.random()*footers,);

Total ActionScript Errors: 1 Reported Errors: 1