if a * b = 2 a - 3 b + ab, then 3 * 5 + 5 * 3 is equal to: Choose the correct choice:
A) 22 B) 37 C) 38 D) 398 E) 72
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">6 + 15</gadget>
<output>21</output>

<result>A</result>
if a * b = 2 a - 3 b + ab, then 3 * 5 + 5 * 3 is equal to:
add(multiply(2, 3), multiply(3, 5))
"explanation : 3 * 5 + 5 * 3 = ( 2 * 3 - 3 * 5 + 3 * 5 ) + ( 2 * 5 - 3 * 3 + 5 * 3 ) = ( 6 + 10 - 9 + 15 ) = 22 . answer : a ) 22"