The Biot-Savart Law helps us figure out the magnetic fields made by wires that carry electric current. But using this law with tricky wire shapes can be tough. Here are some of the challenges you might face:

1. Math Struggles: The Biot-Savart Law uses a math equation like this:

   $$\mathbf{B} = \frac{\mu_0}{4\pi} \int \frac{I \, d\mathbf{l} \times \hat{\mathbf{r}}}{r^2}$$

   In this equation, $I$ means the current, $d\mathbf{l}$ is a small piece of the wire, $\hat{\mathbf{r}}$ is the direction from that piece of wire to the place we're looking at, and $r$ is how far away that place is.

   Sometimes, working with this equation can get really complicated, especially with wires that aren't straight or have unusual shapes.

2. Shapes and Sizes: When wires are arranged in complex ways, figuring out the right parts of the equation to use can be confusing.

3. Adding Fields Together: Often, we deal with more than one wire. This means we have to add up the different magnetic fields from each wire, which makes the math even harder.

To make things easier, you can use computer programs or numerical methods that help with complex shapes and do the complicated math faster. You can also look for patterns, like symmetry, to simplify your calculations. Drawing the problem out can also help you see it better and make it easier to solve.