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How to remove brackets from mathematical algebraic expressions? How to change the symbol? For example: -(a5[ power ]-6b)-(7+3b)
Support removal rules:

1. Parentheses are preceded by a "+". Remove the brackets and the "+"in front of them, and the symbols of the items in brackets remain unchanged.

There is a "-"before the brackets. Remove the brackets and the "-"sign in front, and change the symbols in brackets.

For example: -(a5[ power ]-6b)-(7+3b)

=-a^5+6b-7-3b