[:if
 [:eq
  [:apply
   [:apply
    [:apply
     [:apply
      [:lambda 3 [:lambda 3 [:lambda 3 [:lambda 2 [:var 3]]]]]
      1]
     2]
    3]
   4]
  3]
 [:if
  [:eq [:apply [:lambda 3 [:var 3]] 10] 10]
  [:if
   [:eq [:drop 3 "test"] "t"]
   [:if
    [:eq [:take 3 "test"] "tes"]
    [:if
     [:eq [:str "te" "st"] "test"]
     [:if
      [:not [:and true false]]
      [:if
       [:and true true]
       [:if
        [:not [:or false false]]
        [:if
         [:or false true]
         [:if
          [:lt [:uminus 3] [:uminus 2]]
          [:if
           [:gt 3 2]
           [:if
            [:eq [:uminus 1] [:rem [:uminus 3] 2]]
            [:if
             [:eq 1 [:rem 7 3]]
             [:if
              [:eq [:uminus 1] [:quot [:uminus 3] 2]]
              [:if
               [:eq 2 [:quot 7 3]]
               [:if
                [:eq 6 [:mult 2 3]]
                [:if
                 [:eq 3 [:plus 1 2]]
                 [:if
                  [:eq [:int-to-string 15818151] "test"]
                  [:if
                   [:eq [:string-to-int "test"] 15818151]
                   [:if
                    [:not false]
                    [:if
                     [:eq [:uminus 3] [:minus 2 5]]
                     [:if
                      [:eq 3 [:minus 5 2]]
                      [:if
                       [:eq "test" "test"]
                       [:if
                        [:eq false false]
                        [:if
                         [:eq 3 3]
                         [:if
                          true
                          [:str
                           [:str
                            "Self-check OK, send `solve language_test "
                            [:int-to-string
                             [:plus 2 [:mult 311 124753942619]]]]
                           "` to claim points for it"]
                          "if is not correct"]
                         "binary = is not correct"]
                        "binary = is not correct"]
                       "binary = is not correct"]
                      "binary - is not correct"]
                     "unary - is not correct"]
                    "unary ! is not correct"]
                   "unary # is not correct"]
                  "unary $ is not correct"]
                 "binary + is not correct"]
                "binary * is not correct"]
               "binary / is not correct"]
              "binary / is not correct"]
             "binary % is not correct"]
            "binary % is not correct"]
           "binary > is not correct"]
          "binary < is not correct"]
         "binary | is not correct"]
        "binary | is not correct"]
       "binary & is not correct"]
      "binary & is not correct"]
     "binary . is not correct"]
    "binary T is not correct"]
   "binary D is not correct"]
  "application is not correct"]
 "application is not correct"]