1, be careful first. If there is a power, first calculate the power, then remove the brackets, and finally the algorithm.

When removing brackets, be sure to pay attention to whether there is a negative sign outside. If there is a negative sign, just reverse all the symbols in brackets.

3. To remove the absolute value, we must first judge the range within the absolute value. If it is less than zero, copy the contents of the absolute number, put parentheses, and then add a negative sign in front of it.

Basically, if you master these points, there will be no big problem.

In addition, even if you don't like math, you should lay a good foundation, otherwise it will be difficult to get it back later.