**file1_grad_of_scalar_function**
![file1_grad_of_scalar_function](gifs/file1_grad_of_scalar_function.gif)

**file2_line_int_independent_of_path**
![file2_line_int_independent_of_path](gifs/file2_line_int_independent_of_path.gif)

**file3_line_int_example**
![file3_line_int_example](gifs/file3_line_int_example.gif)