void main() {
    print 2 * 3;
    print 3 + 4 * 5;
    print 6 + 7 * 8 + 9;
    print (3 + 4) * 5;
    print ((3 + 2) * (5 + 1));
    print ((3.0 + 2.0) * (5.0 + 1.0));
    print ((3.0 + 2.0) * (5.0 + 1.0));
    print -3 * -5;
    print -3L * -5L;
}