diff --git a/Aula_20230223.m b/Aula_20230223.m
new file mode 100644
index 0000000..898f081
--- /dev/null
+++ b/Aula_20230223.m
@@ -0,0 +1,30 @@
+%% Symbolic (não testei)
+syms s real
+G = 1/s/(s+2);
+D = 160*(s+4)/(s+30);
+Tr = simplify(D*G/(1+D*G))
+Trl = simplify(1-D*G/(1+D*G))
+%% TF
+clear; clc;
+s = tf('s');
+G = 1/s/(s+2);
+D = 160*(s+4)/(s+30);
+Tr = D*G/(1+D*G)
+minreal(1-Tr)           %Tipo 1
+Kv = 38400/3600
+Tw = -G/(1+D*G)
+minreal(Tw)             %Tipo 0
+step(Tr)
+%step(Tw)
+%% Caso 2
+clear; clc;
+s = tf('s');
+H = 20/(s+20);
+G = 1/s/(s+2);
+D = 160*(s+4)/(s+30);
+Tr = D*G/(1+D*G*H);
+minreal(1-Tr)           %Tipo 1
+Tw = -G/(1+D*G*H);
+minreal(Tw)             %Tipo 0
+step(Tr)
+%step(Tw)
\ No newline at end of file