Your inquiry can be addressed by noting that the phrase "John wants to really do well on this exam" has a specific issue: the presence of a split infinitive.
A split infinitive, which may also be referred to as a cleft infinitive, represents a grammatical structure where an element intervenes between the to and the base form of the verb that follows it. Typically, this interruption comes from an adverb or an adverbial expression. In this particular example, the term inserted between the infinitive particle and the main verb is the adverb "really."
When utilizing quotes from an external source, writers must ensure to: explain how the quotation reinforces their argument, enclose the author’s words in quotation marks, and provide a citation following the direct quote.
the snicker's attitude as seen in line 85 > dismissive disrespect