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Below are the 3 aspects of Algebra and their definitions.

1. Constants - these are the aspects in algebra that do not change or also known as the non-varying. 
2. Variables - are characters, normally alphabetic, that represent numbers, called values, which are arbitrary or unknown.
3. Algebraic Operations - in mathematics, these are the common arithmetic operations (+,-,x,/) raising to a fractional power to perform an algebraic expression.