How to simplify algebraic expressions? Do you have any skills?
In fact, simplification is very simple. If the brackets are removed, the minus sign is in front of them. When deleting the brackets, the symbol in the brackets should be changed to10a-(5d-3z)+8a-3d+z =10a-5d+3z+8a-3d+z, and then the items in the same column should be merged into (10+8) a.