- $ S = - \\\int\\\limits_{ - 1}^1 {f\\\left( x \\\right)dx} + \\\int\\\limits_1^4 {f\\\left( x \\\right)dx} .$
- $ S = - \\\int\\\limits_{ - 1}^1 {f\\\left( x \\\right)dx} - \\\int\\\limits_1^4 {f\\\left( x \\\right)dx} .$
- $ S = \\\int\\\limits_{ - 1}^1 {f\\\left( x \\\right)dx} - \\\int\\\limits_1^4 {f\\\left( x \\\right)dx} .$
- $ S = \\\int\\\limits_{ - 1}^1 {f\\\left( x \\\right)dx} + \\\int\\\limits_1^4 {f\\\left( x \\\right)dx} .$