Expression 4: 1000 left parenthesis, 1 plus left parenthesis, 80 times 0.0 0 1 2 5 , right parenthesis , right parenthesis times left parenthesis, cos left parenthesis, 0.0 1 "x" minus 30 , right parenthesis , right parenthesis10001+80·0.00125·cos0.01x−30