be accurate to say, indeed be so / sayable, to be able to say

difficult / hard, probably impossible

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

not particularly

nothing special; not really

Used when something comes to mind: to recall / Used to express agreement: yeah, of course

(chiefly in the negative) so much; so often; so long; particularly; especially

set of problems

problem; point at issue

text that makes up a question/problem