Quadratic Equation
1. Type: '
x=-b
'.
2. Type: '
\pm
'.
3. Type: '
b^2
' then:
right-arrow
then: '
-4ac
'.
4. Extend left 4 times.
5. Type: '
#
'.
6. Type:
CTRL+up-arrow
.
7. Extend left 3 times.
8. Type: '
%2a
'.