-- Global variable: facsum_combine Default value:
facsum_combine controls the form of the final result returned by
facsum when its argument is a quotient of polynomials. If
false then the form will be returned as a fully expanded sum as described above, but if
true, then the expression returned is a ratio of polynomials, with each polynomial in the form described above.
true setting of this switch is useful when one wants to
facsum both the numerator and denominator of a rational expression, but does not want the denominator to be multiplied through the terms of the numerator.
(%o1) true (%i2)
Q(t):=Q0+I0*t + c*t**...
Q(t):=a + b*t + c*t*t;
xeqn: x(t)= r(t)*sin(...
xdot: diff(xeqn, t, 1);