A really fast thesaurus... with lots of synonyms.

(n) :
any mathematical rule expressed symbolically; a symbolic expression of the structure of a compound

"$x\; =\; \backslash frac\; \{-b\; \backslash pm\; \backslash sqrt\{b^2\; -\; 4ac\}\}\{2a\}$ is the formula for finding the roots of the quadratic equation y = ax^{2} + bx + c."

(n) :
any mathematical rule expressed symbolically; a symbolic expression of the structure of a compound

"$x\; =\; \backslash frac\; \{-b\; \backslash pm\; \backslash sqrt\{b^2\; -\; 4ac\}\}\{2a\}$ is the formula for finding the roots of the quadratic equation y = ax^{2} + bx + c."