Keyword : Symmetrised

S21BAF	Degenerate symmetrised elliptic integral of 1st kind $R_{C} (x, y)$
S21BBF	Symmetrised elliptic integral of 1st kind $R_{F} (x, y, z)$
S21BCF	Symmetrised elliptic integral of 2nd kind $R_{D} (x, y, z)$
S21BDF	Symmetrised elliptic integral of 3rd kind $R_{J} (x, y, z, r)$