1 symbolic >> Symbolic algebra
5 Extended precision arithmetic
9 is_ex is_ex_matrix is_sym is_vpa syminfo
10 Expression manipulation
11 subs collect expand lcoeff numden findsymbols findsym
13 Abs Cos Cosh Exp Gcd Log Sin Sinh Tan Tanh aCos aCosh aSin aSinh
16 tcoeff coeff degree ldegree sym2poly poly2sym sumterms
24 quotient remainder premainder