Solve: - ⁺1 + ⁺2 X - ⁺8.
Solve: - ⁺8 - ⁺5 + ⁻9 - ⁺11.
Solve: - ⁺3 - ⁺11 + ⁺15 + ⁻8.
Solve: - ⁺0 + ⁺3 - ⁺11 + ⁺12
Solve: ⁻2 + ⁺21 - ⁺15
