(d)

Did you know that the expression you have here can be expanded using the binomial theorem? For the term , you can find its expansion by calculating . It gives you a perfect chance to see how terms combine and how coefficients work!

When multiplying it out, avoid common mistakes like forgetting to multiply each term correctly or miscounting the powers of . Breaking it down step by step can help, as well as keeping your work organized. Make sure to combine like terms properly at the end to get the simplest form!