Final answer:
The term 'x-ist' appears to be a pun and not a standard mathematical expression. It is not relevant to traditional mathematics as it mixes a variable with a non-mathematical suffix.
Step-by-step explanation:
The question provided appears to be a play on words involving mathematical symbols. The term 'x-ist' seems to suggest a pun mixing the mathematical variable 'x' with the suffix '-ist' which usually denotes a belief or affiliation. However, this is not a standard mathematical expression.
Given the context, if 'x' is defined as 'ingrown toenails,' then 'x-ist' would imply someone or something that believes in or is specialized in 'ingrown toenails,' which does not fall within a traditional mathematics question. It's important to approach math with clarity and directness, focusing on well-defined variables and operations.