1、e^iπ+ 1=0。 This formula combines the irrational number e in mathematics with pi and imaginary unit I to form a concise and beautiful equation.

2、 143。 This number expresses the romantic meaning of "lifetime" because143 =143 =143 =143, which can be interpreted as the homonym of "lifetime".

3. π. π π is an infinite acyclic decimal, and its decimal part shows the infinite beauty of mathematics in a wonderful way, just like love has no end.

4、7+8= 15。 This equation expresses a kind of happiness in love, just like the combination of two people, forming a complete world.

5、A≈πD^2/4。 This formula is a formula for calculating the area of a circle, where A is the area and D is the diameter. The multiplication of π and d 2/4 in the formula shows the beauty and symmetry of the circle, just like the perfection and balance of love.

6、∑(n= 1~∞ 1/n^2=π^2/6。 This formula expresses the sum of an infinite series, and the result is an irrational number (π 2/6), which shows the profundity and mystery of mathematics and is as fascinating as love.

7. sinπx=x = X. This formula is a wonderful expression of trigonometric function, which combines trigonometric function and algebraic function to form a harmonious and unified picture, just like two people in love.

8、x^2+y^2=r^2。 This formula is a standard equation of a circle, which expresses a perfect symmetry and balance, just like mutual respect and dependence in love.

9. ∫ (1/xdx = ln | x |+C. This formula is a common expression in integral calculus. It combines calculus with natural logarithm to form a concise and philosophical equation, which needs to be accumulated and grown like love.

10、limx→∞ 1+ 1/x^x=e。 This formula is a wonderful expression of limit, which combines limit and natural constant E to form an infinitely close to perfect result, which needs constant pursuit and perfection just like love.

The importance of mathematical formulas is as follows:

1. Mathematical formula is a basic element in mathematics and an accurate expression of mathematical laws. The importance of mathematical formulas is mainly reflected in the following aspects: 1. Mathematical formulas are the key to understanding and mastering mathematical knowledge. Through mathematical formulas, we can understand mathematical concepts and theorems more deeply and master mathematical methods and skills better.

2. For example, Pythagorean theorem, which is a basic geometric formula, tells us that the square of the hypotenuse of a right triangle is equal to the sum of the squares of two right angles. This formula not only enables us to quickly calculate the hypotenuse length of a right triangle, but also enables us to understand and prove many other geometric theorems. Secondly, mathematical formula is an important tool to solve practical problems.