??? Error using ==> inlineeval
Error in inline expression ==> 4*sqrt(1/(15 - 2*x -x.^2))
??? Error using ==> mrdivide
Matrix dimensions must agree.

Error in ==> inline.subsref at 25
    INLINE_OUT_ = inlineeval(INLINE_INPUTS_, INLINE_OBJ_.inputExpr, INLINE_OBJ_.expr);

Error in ==> quad at 71
y = f(x, varargin{:});