How it can be known the names of the mathematica functions used in a

*To*: mathgroup at smc.vnet.net*Subject*: [mg131837] How it can be known the names of the mathematica functions used in a*From*: Guillermo Sanchez <guillermo.sanchez at hotmail.com>*Date*: Sun, 13 Oct 2013 01:29:14 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-outx@smc.vnet.net*Delivered-to*: mathgroup-newsendx@smc.vnet.net

Dear all, How it can be known automatically the names of the mathematica functions used in a Mathematica session? Example: Here is the Mathematica session: Expand[(a + b)^5] Factor[%] Plot[Sin[x], {x, 0, 2 Pi}] I wish build a funcion giving as ouput: {Expand, Factor, %, Plot, Sin} Thank you Guillermo