I don't know how to solve this indefinite integral with both limits as variables:

^x^3
�ç (z^4+1)dz
⌄ln(x)

If you could explain I'd appreciate it.

just do it as usual.

∫[lnx,x^3] (z^4+1) dz
= 1/5 z^5 + z [lnx,x^3]
= (1/5 x^15 + x^3)-(1/5 ln^5(x) + ln(x))

Not very pretty, but c'est la vie...

thank you steve

To solve the indefinite integral ∫(x^3 / (ln(x)) × (z^4+1) dz), where both the limits are variables, we need to follow the steps below:

Step 1: Identify the function to integrate.
In this case, the function is (x^3 / (ln(x)) × (z^4+1).

Step 2: Use the properties of indefinite integrals.
Since both limits, ^x and ⌄ln(x), are variables, we need to integrate the function with respect to z while treating x and ln(x) as constants.

Step 3: Integrate the function.
To integrate the function (x^3 / (ln(x)) × (z^4+1)) with respect to z, we can treat x and ln(x) as constants. The integral of (z^4+1) dz is (z^5/5 + z).

Step 4: Apply the result from Step 3.
The indefinite integral of the given function becomes:
∫((x^3 / (ln(x)) × (z^4+1)) dz = (x^3 / (ln(x)) × (z^5/5 + z)) + C,

where C is the constant of integration.

So, the solution to the indefinite integral with both limits as variables is (x^3 / (ln(x)) × (z^5/5 + z)) + C.