express

ceremony, ritual, function / type, style / (mathematics) a formula or expression

置く: to put / (following a て-form verb) to do in advance; to do for some future purpose

calculation / forecast

to calculate

behind, after

(spatially) the back, the rear, behind / (temporally) later, afterwards, some time after the present / the rest

one's backside / the back, the rear (both spatially and temporally)

the rear, back, or backside of something / the rearward or backward direction / the portion of a palace where a queen or other female imperial consort lives

later, afterwards, some time after the present