下面来看我的示范，一个简单的不定积分：
题目：
参考答案
The integral of a constant with respect to x is the constant times x.
To find the integral of
The indefinite integral also has some unknown constant. This can be proven by completing the opposite operation (derivative) in which C would go to 0. The value of C can be found in cases when an initial condition of the function is given.
