BBcode practise grounds

(define(eval exp env)(cond((self-evaluating? exp) exp)((variable? exp)(lookup-variable-value exp env))((quoted? exp)(text-of-quotation exp))((assignment? exp)(eval-assignment exp env))((definition? exp)(eval-definition exp env))((if? exp)(eval-if exp env))((lambda? exp)(make-procedure(lambda-parameters exp)(lambda-body exp)
                         env))((begin? exp)(eval-sequence(begin-actions exp) env))((cond? exp)(eval(cond->if exp) env))((application? exp)(apply(eval(operator exp) env)(list-of-values(operands exp) env)))(else(error "Unknown expression type - EVAL" exp))))

a => [a]test[/a]
b => test
c => [c]test[/c]
d => [d]test[/d]
e => [e]test[/e]
f => [f]test[/f]
g => [g]test[/g]
h => [h]test[/h]
i => test
j => [j]test[/j]
k => [k]test[/k]
l => [l]test[/l]
m => test
n => [n]test[/n]
o => test
p => [p]test[/p]
q => [q]test[/q]
r => [r]test[/r]
s => test
t => [t]test[/t]
u => test
v => [v]test[/v]
w => [w]test[/w]
x => [x]test[/x]
y => [y]test[/y]
z => [z]test[/z]