**file1_scalar_line_int_as_sum**
![file1_scalar_line_int_as_sum](gifs/file1_scalar_line_int_as_sum.gif)

**file2_scalar_line_integral**
![file2_scalar_line_integral](gifs/file2_scalar_line_integral.gif)


**file3_vector_line_int_as_sum**
![file3_vector_line_int_as_sum](gifs/file3_vector_line_int_as_sum.gif)


**file4_helix**
![file4_helix](gifs/file4_helix.gif)