Dont worry too much about the no-calculator section though. The first math subsection labeled 3 does not allow you to use a calculator while the second math subsection labeled as 4 does allow the use of a calculator. The images on clipboard should be of high resolution such as 400DPI.
Stop using complicated math editors or typing out complex LaTeX code by hand.
The images on clipboard should be of high resolution such as 400DPI. You can select text and press Ctrl C to copy it to your document. If the built-in equations dont meet the actual needs you could edit or modify them or enter your own equation by handwriting especially those with complex symbols and structures. 1 Here is the same long equation with a single equation number but centered.