The following are Year 10 Number-Algebra content-elaborations in the current curriculum:
Apply the four operations to simple algebraic fractions with numerical denominators
expressing the sum and difference of algebraic fractions with a common denominator
using the index laws to simplify products and quotients of algebraic fractions
Solve linear equations involving simple algebraic fractions
solving a wide range of linear equations, including those involving one or two simple algebraic fractions, and checking solutions by substitution
representing word problems, including those involving fractions, as equations and solving them to answer the question
Not essential for all students to learn in Year 10.
God only knows how one develops fluency with expressions that cease to exist.