Final answer:
The question seems to involve combining rational expressions in algebra, but the provided text includes unclear parts and typos. A clear and correct set of expressions is necessary to provide a step-by-step solution.
Step-by-step explanation:
The question seems to pertain to combining rational expressions, which is a topic in algebra. However, the provided text from the student contains several typos and cryptic parts that make the specific expressions they are attempting to combine unclear. Typically, to combine rational expressions, one would find a common denominator, combine the numerators, and then simplify the expression if possible.
To specifically answer your question, we would need the correct forms of the rational expressions you wish to combine. If the expressions were, for instance, 1/(x - y) and -3xy/(x³ - y³), combining them would involve finding a common denominator and adjusting the numerators appropriately. The x³ - y³ in the second fraction suggests there might be a difference of cubes which can be factored into (x - y)(x² + xy + y²). However, without the correct expressions, I can provide only general advice.