\[ | \, 2\cdot 2^2 - 5\cdot 2 - 3 \,| = | \, 2\cdot 4 - 10 - 3 \,| = | \, 8 - 10 - 3 \,| = \]
\[ = | \,-2 - 3 \,| = | \,-5 | = 5 \]