Помогите пожалуйста, срочно

(82,6³+31,6³)/114,2-82,6•31,6=

(82,6+31,6)(82,6²-82,6•31,6+31,6²)/114,2-

82,6²-82,6•31,6+31,6²-82,6•31,6=

(82,6²-2•8²,6•31,6+31,6²)=

(82,6-31,6)²=51²=2601