Keystrokes for scientific symbols on iMac

You can quickly bring up all of the math symbols as well as others by pressing the Fn key after setting the System ➙ Keyboard settings pane like this:

You'll get something like this:

If you select this option under Keyboard:

You'll get this menu option in the menu bar:

Hi,

Following key combinations for common scientific symbols on macOS.

• Common scientific symbols:
  • ∑ (Summation): Option + W
  • π (Pi): Option + P, or Shift + Option + P
  • ∆ (Delta): Option + J
  • ƒ (Function): Option + F
  • Ω (Omega): Option + Z
  • ≈ (Approximately equal to): Option + X
  • √ (Square root): Option + V
  • ∫ (Integral): Option + B
  • ± (Plus-minus): Option + Shift + = (or Option + =)
  • ∞ (Infinity): Option + 5