It has been proposed that we add more functions to the math dialog. A "Further functions" section could include:

Trigonometric, exponential, and logarithmic integral functions: Si, si, Ci, Cin, Shi, Chi, Ei, Ein, Li, li

Airy and Scorer functions: Ai, Bi, Gi, Hi

Signal processing function: sinc

Jacobi elliptic functions: sn, cn, dn, cd, sd, nd, dc, nc, sc, ns, ds, cs