First, let's group all the same types of terms together:
All the x² terms (x², 2x², -2x²),
All the y³ terms (5y³),
All the constant terms (4, -6, 1).
Next, let's handle these different types of terms separately.
1. **The x² terms**
Add all the x² terms together: x² + 2x² - 2x².
The 2x² cancels -2x², so, after adding, you are left with just x².
2. **The y³ terms**
In the given expression, we only have one term with 'y', which is 5y³, so we can't add or subtract it to/from anything, and it remains as is.
3. **The constant terms**
Add all the constant terms together: 4 - 6 + 1.
If you subtract 6 from 4, you get -2. Then adding 1 to -2, you get -1.
Finally, combine everything we have calculated:
Our final expression becomes x² + 5y³ - 1.