'Solve' function getEqns input error

I'm trying to approximate using Matlab.

So I input

    syms x;
    solve ('1.05 = 1000*10^(-19)*[10^(14)/2+sqrt([10^(14)/2]^2+2*10^19*(x/300)^(3/2)*10^19*(x/300)^(3/2)*exp(-1.1/(0.0259*[x/300])))]*100', x);
  and get 

??? Error using ==> solve>getEqns at 202
' 1.05 = 1000*10^(-19)*[10^(14)/2+sqrt([10^(14)/2]^2+2*10^19*(x/300)^(3/2)*10^19*(x/300)^(3/2)*exp(-1.1/(0.0259*[x/300])))]*100 ' is not a valid expression or equation.

Error in ==> solve at 67
[eqns,vars] = getEqns(varargin{:});

By trial and error I found value of x to be 465 and when I use matlab to solve this equation,

1000*10^(-19)*[10^(14)/2+sqrt([10^(14)/2]^2+2*10^19*(456/300)^(3/2)*10^19*(456/300)^(3/2)*exp(-1.1/(0.0259*[456/300])))]*100

I get 1.0491 which is close enough to 1.05

Does 'solve' need special type of input?

Thanks for help

Answer 1

[Walter Roberson]

[] means indexing in MuPAD, but your [] expressions do not follow a variable name.

In MATLAB and MuPAD, the precedence operator always () never [] .

[Anthony Naumenko]

Thanks alot!