at a canter
comfortably
hands down
with one hand tied behind one's back
in a walk
one-handed
readily
painless
eath
effortless
soft
easily
in a jiffy
effortlessly
hotfoot
nonhard
unhurriedly
like a duck takes to water
unstumblingly
eathlins
undifficult
painlessness
unchallenging
unhasting
nontedious
hasteless
gently
facility
one step at a time
unfutile
like sixty
nonchallenging
challengeless
make little of
unchallengingly
unhesitatingly
standing on one's head
undaring
one could do it in one's sleep
uneagerly
unobstructedly
like a shot
fast
handily
clumsily
languidly
unhurryingly
unfumblingly
unhesitantly
sail through