a)11+8{45+4 x[3+8 x(12 x 13-8 x 14)-37]}+1234=
=11+8 x{45+4 x[3+8 x(156-112)-37]}+1234
=11+8 x[45+4 x(3+8 x 44-37)]+1234
=11+8 x[45+4 x(3+352-37)]+1234
=11+8 x[45+4 x(355-37)]+1234
=11+8 x(45+4 x 318)+1234
=11+8 x(945+1272)+1234
=11+8 x 2217+1234
=11+17736+1234
=17747+1234
=18981