Use * / ^ only (no + or −). Numbers and spaces allowed. Negative exponent allowed after ^ (e.g. 10^-3).
Functions: sqrt(x) sin(x) cos(x) tan(x) log(x) ln(x) — angles in degrees.
Examples: 2*3/4 sqrt(6)*3 10^-3 1/7 1/x (reciprocal of value on D, read on DI) sin(30)*2