"he requested reimbursement of $7 for incidental expenses"

"incidental expenses"
"the road will bring other incidental advantages"
"extra duties incidental to the job"
"labor problems incidental to a rapid expansion"
"confusion incidental to a quick change"

"nonessential to the integral meanings of poetry"

"an excessive growth of bureaucracy, with attendant problems"
"snags incidental to the changeover in management"
"attendant circumstances"
"the period of tension and consequent need for military preparedness"
"the ensuant response to his appeal"
"the resultant savings were considerable"