不等

unequal / varied

no; not so / (bound form) not; un-

class / rank / grade / equal to / same as / to wait for / to await / et cetera / and so on / et al. (and other authors) / after / as soon as / once

exchange of unequal values

inequality (math.)

inequality sign (≠, < , ≤, >, ≥)

scalene triangle

the isoperimetric inequality