Expression 3: 1 half StartAbsoluteValue, 3 halves left parenthesis, "S" plus "T" , right parenthesis , EndAbsoluteValue StartAbsoluteValue, StartRoot, 3 , EndRoot left parenthesis, "S" minus "T" , right parenthesis , EndAbsoluteValue1232S+T3S−T
equals=
1.3 4 6 0 3 6 1 0 3 7 41.34603610374
3
The triangle is formed by the three roots of the cubic equation x^3+(1-p)x^2+px+1=0. (If the roots are all real, no triangle is drawn. In that case, line 3 says 'undefined', but the area is zero.)