You can use text to indicate raising a power through several means, depending on context. I will use "raise x to the power of y" as the example throughout this answer:
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It is "raising to the power". Although repeated multiplication can be used for raising to a positive integer power for example, a5 = a*a*a*a*a that analogy fails for rational powers or irrational ones. And it is totally useless when the power is a complex number.
The operation to be used is multiplication.
A protractor will indicate an angle that has to be made.
M is often used to indicate one thousand, and MM is used to indicate one million - both are Roman numerals. It is more likely that 1k is used to indicate one thousand nowadays.
An operation has several meanings. Here are some sentences with different meanings.The surgical operation was a success, and the patient will recover completely.The military operation will take place next week.Operation of that machine takes special training.He used scientific operation to solve the problem.You have a operation at the doc. today at 12:30.The post operation takes field-values from records in the transaction (source) table and uses them to replace, add to, or subtract from field-values of records in master (destination) table.As a noun: My dad ran the operation of the farm and my mom did the bookkeeping.As an adjective: There was an operation notice to shut down all power to the machine.