Download MathWallet first：https://www.mathwallet.org
Switch to Solona wallet (Create new Solana Wallet operation guide)
Then open DApp store – SerumSwap Math
Click Connect Wallet ，and connect with MathWallet
After selecting the input currency/output currency and entering the amount, click Swap to complete the transaction
Provide liquidity
Click Pool and select trading pair. After the value of upper/lower token reached 1:1, click Provide Liquidity
Remove liquidity
Click on My Pools in the upper right corner — select the corresponding pool then click Remove
Web Wallet
First install the MathWallet extension wallet
Solana Extension Wallet User guide
Open DApp store – SerumSwap Math
Then follow the same step as APP guide.