expr.txt

能计算如下表达式：x=3 y=4 z=x^2+sin(y)

1+(2+(3+(4+(5+(6+(7+(8+(9+(10+(11+(12+(13+14))))))))))))

y =sin(pi/2)+3;
x = 3; x+cos(pi)^3

a = 3; b = 4;y = sqr(a^2 +b^2);

y= sqr(-4);

y =sin(1+(3+4)

3*!4.53