The term mathematical operation is identified in base64 scheme by the sequence bWF0aGVtYXRpY2FsIG9wZXJhdGlvbg==, while the MD5 signature is equal to f7715098bbc11465d03f4c218e571a4c. The ASCII encoding of mathematical operation in hexadecimal notation is 6d617468656d61746963616c206f7065726174696f6e.