Seventh graders can make algebraic expressions simpler using some handy tricks:

1. Combine Like Terms: Find terms that are alike, meaning they have the same letters and powers, like $3x$ and $5x$. You can add these together, which makes it easier to work with.

2. Use the Distributive Property: If you have something like $2(x + 3)$, you need to spread the $2$ to both parts: that means it becomes $2x + 6$.

3. Stay Organized: Keep your work neat. Put similar terms next to each other. This will help you avoid mistakes.

With more practice, you'll get the hang of it!