If you are looking for specific manuals or practice books, popular authors and series include:
While not a standard mathematical term, a "deep" piece of algebra typically refers to —moving beyond simple memorization to understand the underlying logic of mathematical objects. In a "deep" assessment, you might encounter: Mathematics Grade 8 Algebra | Chicago Public Schools
Solving equations using the discriminant and Vieta's formulas, as well as factoring quadratic trinomials.
Known for structured test formats and preparation for regional assessments.
Solving linear and numerical inequalities and systems of inequalities.