PARI/GP: ? (((((((788)*(8.46))))+8342*1.803-1))*4186.4*(15))*(((22/((7530/((2)*(((((25))-421))))))*597)+7283.8-9.60+167))+(8871) %1 = 8259816920615.113759362549801 Earlier I said that PARI/GP was an C.A.S. I was wrong. Je me suis trompé. PARI/GP est LE Système de Calcul Algébrique.