diff --git a/Makefile b/Makefile
index bfbcf14..835ca44 100644
--- a/Makefile
+++ b/Makefile
@@ -40,6 +40,7 @@ D_SRCS        = ./src \
 SRCS          = computorv1.c \
 				lexer.c \
 				parser.c \
+				reduce.c \
 				errors.c \
 				print_enums.c
 
diff --git a/headers/computorv1.h b/headers/computorv1.h
index 80d22bf..7583197 100644
--- a/headers/computorv1.h
+++ b/headers/computorv1.h
@@ -125,6 +125,6 @@ const char *term_sign_to_str(e_term_sign sign);
 extern char *input_g_err;
 extern s_token *tokens_g_err;
 extern s_term *terms_g_err;
-extern s_term *polynom_g_err;
+extern s_polynom *polynom_g_err;
 
 #endif
\ No newline at end of file
diff --git a/src/computorv1.c b/src/computorv1.c
index e15fa87..239fb42 100644
--- a/src/computorv1.c
+++ b/src/computorv1.c
@@ -9,6 +9,7 @@
 char *input_g_err;
 s_token *tokens_g_err;
 s_term *terms_g_err;
+s_polynom *polynom_g_err;
 
 /**
  * PROGRAM
@@ -121,7 +122,8 @@ int main(int ac, char **av)
     }
 
     // reduce
-    s_polynom *polynom;
+    s_polynom polynom[1];
+    polynom_g_err = polynom;
     reduce(terms, polynom);
 
     // debug
diff --git a/src/parser.c b/src/parser.c
index e595eab..0bfcb0b 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -66,7 +66,7 @@ static double get_double_value(s_token token)
     return token.value_int;
 }
 
-static double get_coefficient(s_token *tokens, int i, int *token_count)
+static double get_coefficient_absolute(s_token *tokens, int i, int *token_count)
 {
     double coefficient;
 
@@ -227,6 +227,7 @@ int parse(s_token *tokens, s_term *terms, int terms_count_max)
     int i;
     int terms_count;
     int token_count;
+    int sign;
     e_term_position term_position;
 
     check_variables(tokens);
@@ -251,14 +252,19 @@ int parse(s_token *tokens, s_term *terms, int terms_count_max)
         terms[terms_count].position = term_position;
 
         // sign
+        sign = 1;
         e_term_sign ret_sign = get_sign(tokens, i, &token_count);
         terms[terms_count].sign = ret_sign;
+        if (ret_sign == TERM_MINUS)
+        {
+            sign = -1;
+        }
         i += token_count;
         // ft_printf("term[%i] get_sign: (%i)[%s], token_count: [%d]\n", terms_count, ret_sign, term_sign_to_str(ret_sign), token_count); // debug
 
         // coefficient
-        double ret_coefficient = get_coefficient(tokens, i, &token_count);
-        terms[terms_count].coefficient = ret_coefficient;
+        double ret_coefficient = get_coefficient_absolute(tokens, i, &token_count);
+        terms[terms_count].coefficient = ret_coefficient * sign;
         i += token_count;
         // printf("term[%i] get_coefficient: [%g], token_count: [%d]\n", terms_count, ret_coefficient, token_count); // debug
 
diff --git a/src/reduce.c b/src/reduce.c
index f667e16..c8da944 100644
--- a/src/reduce.c
+++ b/src/reduce.c
@@ -4,4 +4,29 @@
 
 void reduce(s_term *terms, s_polynom *polynom)
 {
+    int i;
+    double tmp;
+
+    i = 0;
+    while (terms[i].position != TERM_END)
+    {
+        tmp = terms[i].coefficient;
+        if (terms[i].position == TERM_RIGHT)
+        {
+            tmp *= -1;
+        }
+        if (terms[i].exponent == 2)
+        {
+            polynom->a += tmp;
+        }
+        if (terms[i].exponent == 1)
+        {
+            polynom->b += tmp;
+        }
+        if (terms[i].exponent == 0)
+        {
+            polynom->c += tmp;
+        }
+        i++;
+    }
 }
\ No newline at end of file
diff --git a/src/utils/errors.c b/src/utils/errors.c
index 7c392b8..8310c06 100644
--- a/src/utils/errors.c
+++ b/src/utils/errors.c
@@ -11,7 +11,7 @@ static void print_context_tokens()
 {
     int i;
 
-    ft_putchar('\n');
+    ft_putchar_fd('\n', STDERR_FILENO);
     i = 0;
     while (tokens_g_err[i].type != TOKEN_END)
     {
@@ -54,14 +54,14 @@ static void print_context_tokens()
         }
         i++;
     }
-    ft_putchar('\n');
+    ft_putchar_fd('\n', STDERR_FILENO);
 }
 
 static void print_context_terms()
 {
     int i;
 
-    ft_putchar('\n');
+    ft_putchar_fd('\n', STDERR_FILENO);
     i = 0;
     while (terms_g_err[i].position != TERM_END)
     {
@@ -92,7 +92,14 @@ static void print_context_terms()
         ft_dprintf(STDERR_FILENO, " | %8s : %d\n", "exponent", terms_g_err[i].exponent);
         i++;
     }
-    ft_putchar('\n');
+    ft_putchar_fd('\n', STDERR_FILENO);
+}
+
+static void print_context_polynom()
+{
+    dprintf(STDERR_FILENO, "\npolynom[a]: %10g\n", polynom_g_err->a);
+    dprintf(STDERR_FILENO, "polynom[b]: %10g\n", polynom_g_err->b);
+    dprintf(STDERR_FILENO, "polynom[c]: %10g\n", polynom_g_err->c);
 }
 
 void print_state()
@@ -104,6 +111,8 @@ void print_state()
         print_context_tokens();
     if (terms_g_err)
         print_context_terms();
+    if (polynom_g_err)
+        print_context_polynom();
 }
 
 int stop_errors(e_program_error err, const char *details, ...)