`a ) A = 1500 – { 52 . 23 – 11 . [ 72 – 5 . 23 + 8 . ( 112 – 121 ) ] }`
`= 1500 – { 52 . 23 – 11 . [ 72 – 115 + 8 .(-9) ] }`
`= 1500 – [ 1196 – 11 .(-115) ]`
`= 1500 – 2461`
`= -961`
`b ) B = 32 . 103 – [ 132 – ( 52 . 4 + 22 . 15 ) ] . 103`
`= 32 . 103 – ( 132 –538 ) . 103`
`= 32 . 103 +406 . 103`
`= 103 . (32 + 406)`
`= 103 . 438`
`= 45114`
`c)C = 1 – 2 – 3 + 4 + 5 – 6 – 7 + ... + 2008 + 2009 – 2010 – 2011`
`= (1 – 2 – 3 + 4) + (5 – 6 – 7 +8) + ... + (2005 -2006 -2007+ 2008) + 2009 – 2010 – 2011`
`= 0 + 0 +...+ 0 -1 -2011`
`=-2012`
`d ) D = 1 – 3 + 5 – 7 + ... + 2005 – 2007 + 2009 – 2011`
`= (1 – 3) + (5 – 7) + ... + (2005 – 2007) + (2009 – 2011)`
`= (-2) + (-2) +.....+ (-2)`
`= (-2).503 `
`= -1006`
`e ) E = ( – 10 ) . ( – 7 ) + ( – 15 ) . ( + 5 ) – ( – 3 )^3`
`= 70 -75 +27 `
`= 22`