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Ingenious calculation: the square of 2 + the cube of 2 + the cubic of 2 + the fourth power of 2 + the fifth power of 2 + the sixth power of 2 + the seventh power of 2
two hundred and fifty-two
Simple calculation of 201 ^ 2-200 × 202
Original formula = 201 & sup2; - (201-1) (201 + 1)
=201²-（201²-1）
=201²-201²+1
=1
A simple operation for finding 695 + 202
695+202
=700-5+200+2
=700+200-5+2
=900-3
=897
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