". . . you'd have to do math to divide a smile by a tear times fear equals mere truth. . ."
Provocative statement, for as math rules the numerical reality of say, 
music producing emotion's flow, or human smile,
this mathematical principle, employed in the function 
of smile's divisibility by tears
produces a quotient of innumerable possibilities:

we are given one smile, however tears' quantity we have not
such quantity varies immeasurably, given range of human subjects,
therefore, uncertainty principle herein applies,
whereby outcome is measurable on scale of wide possibilities
whether wryness, joyfulness, anger, ruefulness, ambivalence . . . 
or mixture thereof,
unpredictability is expected given open variables
further, add to the complexity of equation,
factor of fear, 
therefore: smile/ tear x fear = mere truth,

ignoring for a moment the imbalance of this equation
focus upon fear multiplied with the quotient of smile's division by tear,
we have the near impossible task of handling the algorithmic demands of an unquantifiable operation, 
fear will bring the smile/tear quotient to it knees, 
rendering its results to panic,
then chaos, 
unless a restricting element be provided 
preventing its reaching a state critical mass,

now let us address the imbalance of the equation,
if we regard truth as mere, we may assign it numerical value, 1
let us use, 10 to serve as absolute truth,

let us apply the equation to a life scenario:
divide a smile by a tear at a wedding
multiply by fear, perhaps a torn wedding dress
computed together, probably equals mere truth
extrapolated by thousands' years worth of recorded history
might yield absolute truth that:
torn wedding dresses create emotional distress equaling fear, 
an aborted wedding causing a potential bride crying 96 tears, 
encapsulated in a bottle, 
inspiring a song,
recorded in time 
and proclaimed a pop music hit

conclusion: math is not necessary to divide a smile by a tear times fear to equal mere truth,
mere truth is realized simply by living on earth in any scenario