Algebraic expression is a kind of algebraic expression. Algebraic expression that associates numbers and letters representing numbers with operational symbols (including addition, subtraction, multiplication and division) is called algebraic expression. Algebraic expressions include monomials and polynomials.

There are many algorithms for algebraic expressions, such as: in addition and subtraction, there are rules for removing brackets and merging similar items; In the multiplication and division operation, there are powers with the same base, the base is unchanged, and the exponents are added; The same base power division, constant base, exponential subtraction and other algorithms.

The concept opposite to algebraic expression is fraction. Algebraic expressions and fractions are both reasonable. A rational expression is a fraction if its denominator contains letters. If not, it is an algebraic expression. Algebraic expressions and their algorithms have wide application value in mathematics, physics, economy and other fields.

Algebraic expressions are general terms for monomials and polynomials. Multiplication operations that contain only letters and do not include addition and subtraction are called monomials. Polynomials are obtained by adding and subtracting several monomials.

Solution of integral equation:

1, denominator {both sides of the equation are multiplied by the simplest common denominator at the same time (simplest common denominator: ① coefficient is the least common multiple).

2. Remove the bracket (remember to look at the symbol when removing the bracket).

3. Moving term (add and subtract the same number or the same algebraic expression on both sides of the equation, usually put the unknown on the left side of the equation and the constant on the right side. )。

4. Merge similar projects.

5. The coefficient is 1.