Unique rules when forming that grammar are highlighted like this.
Example sentences follow these rules too!
Joining and Nesting Markers:
Verb[た/る] - means that dictionary form and ta form are accepted.
Verb[causative[て]] - means て form of the causative form of the verb.
(A) こそすれ (B), when followed by the clause ending with a negative form is used in written language to strongly emphasize that (A) is the case, certainly not (B). The imperative form is used to contrast the clauses.