%flow.fg1 \flowchart{\flowstart\flowinput{$a,b,c$} \flowcompute{$d={b^2-4ac}$} \flowcompute{$\displaystyle x_1={b+\sqrt d\over-2a\strut}$ % \strut inhibits touching of the two % formulae in a vertical arrangement $\displaystyle x_2={b-\sqrt d\over-2a}$} \flowoutput{$x_1,x_2$}\flowend}