Write as a single fraction \(\frac{1}{1 - x} + \frac{2}{1 + x}\)

What must be added to the expression x\(^2\) - 18x to make it a perfect square?

Solve the equation \(\frac{m}{3} + \frac{1}{2} = \frac{3}{4} + \frac{m}{4}\)

The angle of a sector of a circle of radius 8cm is 240°. This sector is bent to form a cone. Find the radius of the base of the cone.

The curved surface area of a cylindrical tin is 704cm\(^2\). Calculate the height when the radius is 8cm. [Take π = 22/7]