update math expression in eliza-with-fhe.md

docs/docs/advanced/eliza-with-fhe.md

@@ -38,28 +38,28 @@ The main idea of FHE is that operations performed on the encrypted data produce
 #### Core Components
 
 1. **Encryption**: Transform plaintext data into ciphertext using an encryption key.
-   ```math
-   c = E_k(m)
-   ```
+
+   $$c = E_k(m)$$
+
    Where:
    - $m$: plaintext message
    - $k$: encryption key
    - $E_k$: encryption function
    - $c$: ciphertext
 
 3. **Computation on Encrypted Data**: Perform operations directly on the ciphertext, such as addition or multiplication, to produce a new ciphertext.
-   ```math
-   c' = F(c_1, c_2)
-   ```
+
+   $$c' = F(c_1, c_2)$$
+
    Where:
    - $c_1, c_2$: input ciphertexts
    - $F$: homomorphic function (e.g., addition, multiplication)
    - $c'$: resulting ciphertext after computation
 
 4. **Decryption**: Decrypt the result to reveal the final output, which matches the result of performing the operation on the plaintext.
-   ```math
-   m' = D_k(c')
-   ```
+
+   $$m' = D_k(c')$$
+
    Where:
    - $D_k$: decryption function
    - $m'$: result of computation in plaintext form