+\(em
+roman "quoted words:"
+"sin" "cos" "tan" "sec" "csc" "asin" "acos" "atan" "asec" "acsc"
+"sinh" "cosh" "tanh" "coth" "arc"
+"max" "min" "lim" "log" "ln" "exp"
+"Re" "Im" "and" "if" "for" "det"
+\(em
+roman "font operations:"
+bold sin
+bold "sin"
+\(em
+roman "superstring:"
+sinus
+\(em
+roman "composite word:"
+tan = sin/cos