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2¹⁹⁹⁷×3¹⁹⁹⁸₋2¹⁹⁹⁸×3¹⁹⁹⁷=

Răspuns :

2¹⁹⁹⁷*3¹⁹⁹⁸  -  2¹⁹⁹⁸ * 3 ¹⁹⁹⁷=
=2¹⁹⁹⁷* 3¹⁹⁹⁷ *(3-2)=
=2¹⁹⁹⁷* 3¹⁹⁹⁷=
=6
¹⁹⁹⁷