The diagram shows a rectangle PQRSPQRSPQRS. The length of side PQ PQ\,PQ is 4x−24x - 24x−2. The length of side SR SR\,SR is 2x+102x + 102x+10. All measurements are in centimetres.

The width QR QR\,QR of the rectangle is 12 cm.
Find the area of PQRSPQRSPQRS.