(1+3+5+...+2011)x(125125x127-127127x125)
= (1+3+5+....+2011)x(125x1001x127-127x1001x125)
= (1+3+5+...+2011)x0
= 0
`(1+3+3+....+2011) xx ( 125125 xx 127 - 127127 xx 125)`
`= (1+3+3+....+2011) xx ( 15890875 - 15890875)`
` = (1+3+3+....+2011) xx 0`
` = 0`
`(1+3+3+....+2011) xx ( 125125 xx 127 - 127127 xx 125)`
`= (1+3+3+....+2011) xx ( 15890875 - 15890875)`
` = (1+3+3+....+2011) xx 0`
` = 0`