Continue with the next step by composing and proving the input (Expression) as indicated below.
add(add(add(int(triggerOutputs()?[‘body/Col_x002d_1’]),int(triggerOutputs()?[‘body/Col_x002d_2’])),int(triggerOutputs()?[‘body/Col_x002d_3’])),int(triggerOutputs()?[‘body/Col_x002d_4’]))