updated math syntax

content/calculus/function-of-several-variables.md

@@ -46,6 +46,7 @@ Theorem:
 \]
 
 ## Lagrange Multipliers
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 Theorem:
 \[
@@ -61,3 +62,4 @@ To find absolute extremas using lagrange multipliers:
     - Determine \(x\) and \(y\) for each case of \(\lambda\).
 5. Evaluate the points \((x,y)\) you've found in \(f(x,y)\). The largest value is the absolute maximum. The smallest value is the absolute minimum.
 
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