The structure on the left does not have any resonance contributors in which electrons are. donated to the carbon with the open octet. Compare this with the carbocation that has. resonance and a delocalized positive charge. Charge delocalization imparts stability, so. the structure with resonance is lower in energy.
A numerical expression is a mathematical sentence involving only numbers and one or more operation symbols. Examples of operation symbols are the ones for addition, subtraction, multiplication, and division. They can also be the radical symbol (the square root symbol) or the absolute value symbol.
Math terms are commonly seen in algebra equations. Using operators, such as addition and subtraction signs, terms are grouped together to form an expression. Each number in the equation represents a single term. For example: In a straightforward arithmetic problem, the first and second numerical terms are added, subtracted or multiplied together to find the term that provides the answer to the problem.