MATLAB

matlab symbolic fraction numerator

[N,D] = numden(A)

matlab symbolic simplify fraction

simplifyFraction(expr)
simplifyFraction(expr,'Expand',true)

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% simplifyFraction(expr) simplifies the rational expression expr such that the
% numerator and denominator have no divisors in common.
%
% simplifyFraction(expr,'Expand',true) expands the numerator and denominator
% of the resulting simplified fraction as polynomials without factorization.