@@ -209,19 +209,22 @@ static double evalPrimary(Parser *p){

     return d;

 }

-static double evalPow(Parser *p){

-    int sign= (*p->s == '+') - (*p->s == '-');

-    p->s += sign&1;

-    return (sign|1) * evalPrimary(p);

+static double evalPow(Parser *p, int *sign){

+    *sign= (*p->s == '+') - (*p->s == '-');

+    p->s += *sign&1;

+    return evalPrimary(p);

 }

 static double evalFactor(Parser *p){

-    double ret= evalPow(p);

+    int sign, sign2;

+    double ret, e;

+    ret= evalPow(p, &sign);

     while(p->s[0]=='^'){

         p->s++;

-        ret= pow(ret, evalPow(p));

+        e= evalPow(p, &sign2);

+        ret= pow(ret, (sign2|1) * e);

     }

-    return ret;

+    return (sign|1) * ret;

 }

 static double evalTerm(Parser *p){