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(3 x 9) +(4x9)=
(10x10)-(6X6)=
(8X7) -(4x4)=
(8x8)+(3X3)=
(10x10)- (4x9)=
9x(9-5)=
8x(7+5)=
6X(4-4)=
5x(5+0)=​