In order to avoid silly mistakes
As a math idiot
I want to be able to perform arithmetic on the calculator
When $a \ne 0$, there are two solutions to $(ax^2 + bx + c = 0)$ and they are
$$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$
Tags: @arithmetic, @fast
Add two numbers
$50 + 70 = 120$
# In the DHTML version, the description will be rendered with mathematical formulas if the experimental features are enabled.Given I have entered 50 into the calculator