Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
 Fred alikuwa na karatasi 212. Alipokea karatasi nyingine 307 kutoka kwa Jane na akampa Charles karatasi 156. Fred anabakiwa na karatasi ngapi?


### Response:
 Alikuwa na karatasi 212 na alipokea karatasi 307 zaidi kwa jumla ya karatasi 212+307 = <<212+307=519>>519.
Alitoa karatasi 156 hivyo anabakiwa na karatasi 519-156 = 363.