The results of the exam are out.

Years of effort finally bore fruit.

This project has had a negative impact.

The result of this calculation will be minus.

Please loosen this screw using a flathead screwdriver.

He was able to solve the complex calculation quickly.

He was calculating in his head.

These experimental results support our hypothesis.

Understanding plus or minus is important for this problem.

His efforts and his negligence cancel each other out.