"Cyphering" is the British spelling of the American word "ciphering," which refers to the act of putting a message into a secret code or performing mathematical calculations.
"Massacring" is the present participle form of the verb "massacre," which means to brutally and indiscriminately kill a large number of people or animals, often in a violent or horrifying manner.
"Ameture" is a misspelling of "amateur," which is a noun or adjective used to describe a person who engages in a particular activity, pursuit, or field of interest without being a professional
"Jack of all trades" is an idiomatic expression used to describe a person who has a wide range of skills or can do many different types of tasks competently, but they may not be an expert in any one particular area.