C has to be a number, and numbers need a ones place, so try something like
correct: A=-0.5 and B=-1 and C=frac.evaluateAt(1) and D=6
frac = simpleFunction("\frac{1}{6}")
C has to be a number, and numbers need a ones place, so try something like
correct: A=-0.5 and B=-1 and C=frac.evaluateAt(1) and D=6
frac = simpleFunction("\frac{1}{6}")