x-x-x3=26-1+2

To solve the equation \( x - x - x^3 = 26 - 1 + 2 \), let's first simplify the right side.

\[ 26 - 1 + 2 = 25 + 2 = 27 \]

Now the equation looks like this:

\[ x - x - x^3 = 27 \]

The \( x - x \) cancels out, simplifying our equation to:

\[ -x^3 = 27 \]

Now, multiply both sides by -1:

\[ x^3 = -27 \]

To find \( x \), take the cube root of both sides:

\[ x = \sqrt[3]{-27} \]

Since \( -27 = -3^3 \), we have:

\[ x = -3 \]

Thus, the solution is:

\[ \boxed{-3} \]