How do i write my algebra equations on my computer

To type an equation from scratch, press Alt += on your keyboard. Choose Insert > Equation and select Insert New Equation from the bottom of the built in equation gallery. This inserts an equation placeholder where you can type your equation. Select the equation you want to add. Choose the down arrow and select Save as New Equation

If you need the pi sign just look up a copy and paste version of it.

But you type it how you write it other then that .

For example : 3x^2+5x^4-6y^3+6x-1= whatever

The ^ shows that your writing a number with a exponent attached to it

So if a expression has exponents just write out 3x^4