[Bug] diff(cos(x^2)*cos(x^2))
>> diff(cos(x^2)*cos(x^2))
Polyn Mode> my_string = cos[,x,2,^,],cos[,x,2,^,],*
input> cos[x^2]*cos[x^2]
diff> -cos[x^2]*sin[x^2]*x^2*2*1/x-sin[x^2]*x^2*2*1/x*cos[x^2]
out> -cos(x^2)*sin(x^2)*x^2*2*1/x-sin(x^2)*x^2*2*1/x*cos(x^2)
Polyn Mode> my_string = 0,cos,x,2,^,sin,x,2,^,*,x,2,^,*,2,*,1,*,x,/,-,sin,x,2,^,x,2,^,*,2,*,1,*,x,/,cos,x,2,^,*,-,
Fraction Mode> my_string = 2,
Fraction Mode> my_string = 2,
Fraction Mode> my_string = 2,
Fraction Mode> my_string = 2,
Fraction Mode> my_string = 2,
Fraction Mode> my_string = 2,sinx,4,^,*,1,x,1,^,*,-,
Fraction Mode> my_string = 2,
Fraction Mode> my_string = 1,
Fraction Mode> my_string = 0,1,-,
Fraction Mode> my_string = 1,
Fraction Mode> my_string = 1,
Fraction Mode> my_string = 2,
Fraction Mode> my_string = 1,
Fraction Mode> my_string = 2,
Fraction Mode> my_string = 2,
Fraction Mode> my_string = 1,
Fraction Mode> my_string = 2,
Fraction Mode> my_string = 2,
导致无穷循环.
直接输入下面的也会导致无穷循环
-cos(x^2)*sin(x^2)*x^2*2*1/x
g(x)*f(x)/x