jack-easy
easyish
easy as 123
easy as ABC
cinchy
simple as kiss your hand
easy as falling off a log
easy as pie
pimpsy
piss-easy
supereasy
eath
easy peasy
cake walk
nimps
eathy
downhill
mick
hakuna matata
like taking candy from a baby
in a walk
painless
easify
easy
there's nothing to it
with one hand tied behind one's back
no problem
lead-pipe cinch
straightforward
cinch
at a canter
comfortably
one-handed
nothing to it
nonhard
standing on one's head
supersimple
facile
unconcerned
easefully
ultrasimple
handily
plain as Dunstable highway
hands down
skive
eathlins
easy peasy lemon squeezy
plain sailing
uncomplicated
elementary