belong to

mathematics (field of study)

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

榎, 朴, 𪱻: Chinese hackberry

蟻の子: ant, particularly one without wings; an ant egg or larva

榎茸: enokitake

男, 男の子: a boy

退く: resign, quit

end of eaves / near eaves

eaves / narrow aisle surrounding the core of a temple building