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36x54+36x36 79x199+79x1 55x65+65x45 97x99+97x1 ...

36x54+36x36=36x(54+36)=36x90=3240 79x199+79x1=79x(199+1)=79x200=15800 55x65+65x45=65x(55+45)=5=65x100=6500 97x99+97x1=97x(99+1)=97x100=9700 125x15+125x1=125x(15+1)=125x16=125x4x4=2000 999x222+333x334=333x3x222+333x334=333x(666...

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