Find all triplets of integers $(a, b, c)$, that verify the equation $$|a+3|+b^2+4\cdot c^2-14\cdot b-12\cdot c+55=0.$$
1. Start with the given equation:
   \[
   |a+3| + b^2 + 4c^2 - 14b - 12c + 55 = 0
   \]

2. Rewrite the equation by completing the square for the terms involving \(b\) and \(c\):
   \[
   |a+3| + b^2 - 14b + 4c^2 - 12c + 55 = 0
   \]
   \[
   |a+3| + (b^2 - 14b + 49) + (4c^2 - 12c + 9) - 49 - 9 + 55 = 0
   \]
   \[
   |a+3| + (b-7)^2 + 4(c-\frac{3}{2})^2 - 3 = 0
   \]
   \[
   |a+3| + (b-7)^2 + 4(c-\frac{3}{2})^2 = 3
   \]

3. Since \(4(c-\frac{3}{2})^2\) must be an integer, \(c-\frac{3}{2}\) must be an integer multiple of \(\frac{1}{2}\). Therefore, \(c\) must be an integer such that \(2c-3\) is an integer.

4. Consider the possible values for \(|a+3|\):
   - If \(|a+3| = 0\), then \(a = -3\).
   - If \(|a+3| = 1\), then \(a = -2\) or \(a = -4\).
   - If \(|a+3| = 2\), then \(a = -1\) or \(a = -5\).

5. For each case, solve for \(b\) and \(c\):

   - **Case 1: \(|a+3| = 0\)**
     \[
     a = -3
     \]
     \[
     (b-7)^2 + 4(c-\frac{3}{2})^2 = 3
     \]
     \[
     (b-7)^2 + 4(c-\frac{3}{2})^2 = 3
     \]
     - \(4(c-\frac{3}{2})^2\) must be 0 or 1 or 2 or 3.
     - If \(4(c-\frac{3}{2})^2 = 1\), then \((c-\frac{3}{2})^2 = \frac{1}{4}\), so \(c = 2\) or \(c = 1\).
     - If \(4(c-\frac{3}{2})^2 = 0\), then \(c = \frac{3}{2}\), which is not an integer.
     - If \(4(c-\frac{3}{2})^2 = 2\), then \((c-\frac{3}{2})^2 = \frac{1}{2}\), which is not possible for integer \(c\).
     - If \(4(c-\frac{3}{2})^2 = 3\), then \((c-\frac{3}{2})^2 = \frac{3}{4}\), which is not possible for integer \(c\).

     Therefore, \(c = 2\) or \(c = 1\).

     - For \(c = 2\):
       \[
       (b-7)^2 + 4(2-\frac{3}{2})^2 = 3
       \]
       \[
       (b-7)^2 + 1 = 3
       \]
       \[
       (b-7)^2 = 2
       \]
       - This has no integer solutions for \(b\).

     - For \(c = 1\):
       \[
       (b-7)^2 + 4(1-\frac{3}{2})^2 = 3
       \]
       \[
       (b-7)^2 + 1 = 3
       \]
       \[
       (b-7)^2 = 2
       \]
       - This has no integer solutions for \(b\).

   - **Case 2: \(|a+3| = 1\)**
     \[
     a = -2 \text{ or } a = -4
     \]
     \[
     (b-7)^2 + 4(c-\frac{3}{2})^2 = 2
     \]
     - If \(4(c-\frac{3}{2})^2 = 0\), then \(c = \frac{3}{2}\), which is not an integer.
     - If \(4(c-\frac{3}{2})^2 = 1\), then \((c-\frac{3}{2})^2 = \frac{1}{4}\), so \(c = 2\) or \(c = 1\).
     - If \(4(c-\frac{3}{2})^2 = 2\), then \((c-\frac{3}{2})^2 = \frac{1}{2}\), which is not possible for integer \(c\).
     - If \(4(c-\frac{3}{2})^2 = 3\), then \((c-\frac{3}{2})^2 = \frac{3}{4}\), which is not possible for integer \(c\).

     Therefore, \(c = 2\) or \(c = 1\).

     - For \(c = 2\):
       \[
       (b-7)^2 + 4(2-\frac{3}{2})^2 = 2
       \]
       \[
       (b-7)^2 + 1 = 2
       \]
       \[
       (b-7)^2 = 1
       \]
       \[
       b-7 = \pm 1
       \]
       \[
       b = 8 \text{ or } b = 6
       \]

     - For \(c = 1\):
       \[
       (b-7)^2 + 4(1-\frac{3}{2})^2 = 2
       \]
       \[
       (b-7)^2 + 1 = 2
       \]
       \[
       (b-7)^2 = 1
       \]
       \[
       b-7 = \pm 1
       \]
       \[
       b = 8 \text{ or } b = 6
       \]

     Therefore, the solutions for \((a, b, c)\) are:
     \[
     (-2, 8, 2), (-2, 6, 2), (-4, 8, 2), (-4, 6, 2)
     \]

   - **Case 3: \(|a+3| = 2\)**
     \[
     a = -1 \text{ or } a = -5
     \]
     \[
     (b-7)^2 + 4(c-\frac{3}{2})^2 = 1
     \]
     - If \(4(c-\frac{3}{2})^2 = 0\), then \(c = \frac{3}{2}\), which is not an integer.
     - If \(4(c-\frac{3}{2})^2 = 1\), then \((c-\frac{3}{2})^2 = \frac{1}{4}\), so \(c = 2\) or \(c = 1\).

     Therefore, \(c = 2\) or \(c = 1\).

     - For \(c = 2\):
       \[
       (b-7)^2 + 4(2-\frac{3}{2})^2 = 1
       \]
       \[
       (b-7)^2 + 1 = 1
       \]
       \[
       (b-7)^2 = 0
       \]
       \[
       b = 7
       \]

     - For \(c = 1\):
       \[
       (b-7)^2 + 4(1-\frac{3}{2})^2 = 1
       \]
       \[
       (b-7)^2 + 1 = 1
       \]
       \[
       (b-7)^2 = 0
       \]
       \[
       b = 7
       \]

     Therefore, the solutions for \((a, b, c)\) are:
     \[
     (-1, 7, 2), (-1, 7, 1), (-5, 7, 2), (-5, 7, 1)
     \]

Conclusion:
The complete set of solutions for \((a, b, c)\) is:
\[
(-2, 8, 2), (-2, 6, 2), (-4, 8, 2), (-4, 6, 2), (-1, 7, 2), (-1, 7, 1), (-5, 7, 2), (-5, 7, 1)
\]

The final answer is \( \boxed{ (-2, 8, 2), (-2, 6, 2), (-4, 8, 2), (-4, 6, 2), (-1, 7, 2), (-1, 7, 1), (-5, 7, 2), (-5, 7, 1) } \)