7+2=56
6+3=48
5+5=45
2+1=4
4+9=??
Solve it?	Choose the most appropriate option:
A) 92  B) 48  C) 42  D) 38  E) 72
x+y=x[y+(x-1)]=x^2+xy-x   7+2=7[2+(7-1)]=49+14-7= 
<gadget id="calculator">49+14-7</gadget>
<output>56</output>
56   6+3=6[3+(6-1)]=36+18-6= 
<gadget id="calculator">36+18-6</gadget>
<output>48</output>
48   5+5=5[5+(5-1)]=25+25-5= 
<gadget id="calculator">25+25-5</gadget>
<output>45</output>
45   2+1=2[1+(2-1)]=4+2-2= 
<gadget id="calculator">4+2-2</gadget>
<output>4</output>
4   4+9=4[9+(4-1)]=16+36-4= 
<gadget id="calculator">16+36-4</gadget>
<output>48</output>
48   Answer :48
<result>B</result>
7+2=56
6+3=48
5+5=45
2+1=4
4+9=??
Solve it?