1. Latex equation to picture

https://www.sciweavers.org/free-online-latex-equation-editor

2. Online paper citation graph

https://www.connectedpapers.com

3. Code to picture

https://carbon.now.sh/

4. Latex Mathematical Symbols

https://www.cmor-faculty.rice.edu/~heinken/latex/symbols.pdf

5. CORE Rankings

https://www.core.edu.au/conference-portal