As stated in the white paper, MATH has used 20% of the income earned from Apr 1, 2021 to June 30, 2021 to repurchase and burn 109,150 MATH (approx. 107,370 USD).
We have completed this round of MATH burn. You can check the burn records via the blockchain browser:
https://etherscan.io/tx/0xed3fda3fd46d8b4e253e0ecd116b6eb4eeb011a0cf55b6c2a3d595ae2b4fccf4