Can I get some help on this problem, in detail please?

7 { 6 [ 8*( T - 6 ) +12 ] + 2* ( T + 11 ) } ^2

7 { 6 [ 8T - 48 + 12 ] + 2T + 22} ^ 2

7 { 6 [ 8T - 36 ] + 2T + 22} ^ 2

7 { 48T - 216 + 2T + 22} ^ 2

7 { 50T - 194 } ^ 2

7 { 50T^2 - 37636}

{ 350T^2 - 263452}

Is this the correct answer?