All but the first two of these are spelled correctly. How many can you unravel?

abcdefghijklnopqrstuvwxyz+

(a+b)*

ter-

imp/ish

sh/mac

gr+st+

b-ings

sur+

in-ence

m@hem@ics

au^ism

-d=establ=hmentarian=m

in=ity

(Ba)x(lon)

(ship+man)/2

re+e

y+a-y+a-y+a

-+sed