3+2=12
4+1=16
5+9=65
6+8=78
7+3=??
Solve it?	Choose one.
A) 12 B) 16 C) 68 D) 42 E) 91
x+y=x[y+(x-1)]=x^2+xy-x   3+2=3[2+(3-1)]=9+6-3= 
<gadget id="calculator">9+6-3</gadget>
<output>12</output>
12   4+1=4[1+(4-1)]=16+4-4= 
<gadget id="calculator">16+4-4</gadget>
<output>16</output>
16   5+9=5[9+(5-1)]=25+45-5= 
<gadget id="calculator">25+45-5</gadget>
<output>65</output>
65   6+8=6[8+(6-1)]=36+48-6= 
<gadget id="calculator">36+48-6</gadget>
<output>78</output>
78   7+3=7[3+(7-1)]=49+21-7= 
<gadget id="calculator">49+21-7</gadget>
<output>63</output>
63   Answer :68
<result>C</result>
3+2=12
4+1=16
5+9=65
6+8=78
7+3=??
Solve it?