Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
what is the since beginning of big 12 when last 10 meetings is ou, 7-3, neutral site is ou, 2-1, and last 5 meetings is bu, 3-2?

### Inputs:
table_name: table, columns: ['Oklahoma vs.', 'Overall Record', 'at Norman', "at Opponent's Venue", 'at Neutral Site', 'Last 5 Meetings', 'Last 10 Meetings', 'Current Streak', 'Since Beginning of Big 12']

### Response:
SELECT Since Beginning of Big 12 FROM table WHERE Last 10 Meetings = ou, 7-3 AND at Neutral Site = ou, 2-1 AND Last 5 Meetings = bu, 3-2