syms does not work

I have been trying to get my syms to work. Here is my code:

syms x
f=2*x
int(f,x)

However, Here is the error I got:

错误使用 mupadengine/evalin2double

无效表达式。请检查缺失的乘法运算符、缺失或不对称的分隔符或者其他语法错误。要构造矩阵，请使用方括号而不是圆括号。

出错 mupadengine/feval2double

出错 sym/numel (第 18 行)

y = feval2double(symengine, 'symobj::numel', x.s);

出错 sym/isempty (第 729 行)

y = numel(x)==0;

出错 sym/privsubsasgn (第 1141 行)

if ~isDeleting && isempty(L) && isempty(R)

出错 索引 (第 1025 行)

C = privsubsasgn(L,R,inds{:});

出错 syms (第 268 行)

defined(k) = nsym;

出错 equation (第 1 行)

syms x

I have tried to look up on google but nothing is useful. I have been trying to print out these:

When I print out

restoredefaultpath
rehash toolboxcache

I can see the symbolic path in the toolbox.

When I print out

ver

I can find out :

Symbolic Math Toolbox 版本 24.1 (R2024a)

[Torsten]

syms x
f=2*x
int(f,x)

And this is really the complete code you use ?

[Walter Roberson]

Approximate translation:

Error using mupadengine/evalin2double

Invalid expression. Check for missing multiplication operators, missing or unsymmetrical delimiters, or other syntax errors. To construct matrices, use square brackets instead of parentheses.

Error in mupadengine/feval2double

Error in sym/numel (line 18) y = feval2double(symengine, 'symobj::numel', x.s);

Error in sym/isempty (line 729) y = numel(x)==0;

Error in sym/privsubsasgn (line 1141) if ~isDeleting && isempty(L) && isempty(R)

Error in indexing (line 1025) C = privsubsasgn(L,R,inds{:});

Error in syms (line 268) defined(k) = nsym;

Error in equation (line 1) syms x

Answer 1

[Walter Roberson]

I suspect you are going to need to reinstall MATLAB + toolboxes

[Zeyuan]

I will try that

[Zeyuan]

It worked @Walter Roberson