function _getDynamicFees(uint256 tradeAmount, uint256 poolAmount) internal pure returns (uint256) {
uint256 numerator = _DYNAMIC_FEE_ALPHA * tradeAmount.mul(tradeAmount).mul(tradeAmount);
uint256 denominator = poolAmount.mul(poolAmount).mul(poolAmount);
uint256 ratio = numerator.div(denominator);
return ratio.mul(tradeAmount) / 100;