x^2y"-xy'=x^3

(xy'-y)/x^2=x

(y/x)'=x

Bilateral integral

y/x=x^2/2+C

Extended data:

The formula used in the field of complex analysis, Euler formula relates trigonometric function and complex exponential function, so it is called Euler formula. Because Euler formula was put forward by leonhard euler, it is named after him.

This complex exponential function is sometimes written as {cis}(x) (English: cosine plus sine, cosine plus I sine). Because this formula still holds when x is a complex number, some people call this a more general version of Euler's formula.