An equation has the 'equals' sign ( = ) in it. An expression hasn't.
of Discern
By using context clues.
Facial expressions, composure, and auditory clues are best directed toward the audience.
You can look for expressive words in the sentence surrounding the idiom.
context
Context clues
context
The day of the episode is needed to determine an answer
onychomycosis
in a dictionary
in a dictionary
Non verbal clues are communication from another person without words; communication received from facial expressions, gestures, or body language.