PLEASE HELP ME!!! THIS IS URGENT!!!! Solve (2625)-(2524)+(2423)-(2322)+(2221)-(2120)+(2019)-(1918)+(1817)-(1716)+(1615)-(1514)= Please simplify each parenthesis.

[tex]\left(26\cdot 25\right)-\left(25\cdot 24\right)+\left(24\cdot 23\right)-\left(23\cdot 22\right)+\left(22\cdot 21\right)-\left(21\cdot 20\right)+\left(20\cdot 19\right)-\left(19\cdot 18\right)+\left(18\cdot 17\right)-\left(17\cdot 16\right)+\left(16\cdot 15\right)-\left(15\cdot 14\right)[/tex]

[tex]650-600+552-506+462-420+380-342+306-272+240-210[/tex]

[tex]=240[/tex]

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PLEASE HELP ME!!! THIS IS URGENT!!!! Solve (26*25)-(25*24)+(24*23)-(23*22)+(22*21)-(21*20)+(20*19)-(19*18)+(18*17)-(17*16)+(16*15)-(15*14)= Please simplify each parenthesis.

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PLEASE HELP ME!!! THIS IS URGENT!!!! Solve (2625)-(2524)+(2423)-(2322)+(2221)-(2120)+(2019)-(1918)+(1817)-(1716)+(1615)-(1514)= Please simplify each parenthesis.