i tried to send xml request in jmeter as **<Calc><Info>**
.. but i recive request as < ; CalcReq > < ; Info > please help
JMeter should send the request "as it is", it might be the case your application does escaping of the XML special characters
Demo:
In general it's not possible to come up with the comprehensive answer without seeing your HTTP Request sampler configuration, and request body/headers from the View Results Tree listener. It might be the case you didn't add the relevant Content-Type header using the HTTP Header Manager so your application doesn't know how to properly deal with the request.
More information: Building a WebService Test Plan