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2014-10-14T16:12:14+03:00
-1+(16-2*9)^2:5/2-1=-1+4*2/5-1=8/5-2=(8-10)/5=-2/5 5/9:[(-3)^4*(-3)^-3]^-2=5/9:(-3)^-2=5/9:1/9=5/9*9/1=5
2 5 2