diff --git a/Areas/electricity/formulas.md b/Areas/electricity/formulas.md
index 65a9a6d..faf3868 100644
--- a/Areas/electricity/formulas.md
+++ b/Areas/electricity/formulas.md
@@ -83,7 +83,7 @@ $\displaystyle X_{c} = \frac{1}{2 \pi fC}$
 
 $\displaystyle X_{l} = 2\pi fL$
 
-# Filters
+# Analog Filters
 
 ## Cutoff Frequency for RC Filters 
 
@@ -93,8 +93,7 @@ $\displaystyle f_{c} = \frac{1}{2\pi RC}$
 
 $\displaystyle f_{c} = \frac{R}{2\pi L}$
 
-
-## Signal Response of an RC Filter
+## Signal Response of an RC/RL Filter
 
 $X_c$ = [[#Capacitive Reactance]] || [[#Inductive Reactance]]
 
@@ -106,11 +105,11 @@ $\displaystyle f_{(-3db)} = f_{c}\sqrt{2^{(\frac{1}{n})}-1}$
 
 Where $n$ = Number if **identical** filters
 
-# Resonance Frequency for RLC Low Pass Filter
+## Resonance Frequency for RLC Low Pass Filter
 
 $\displaystyle f_{o} = \frac{1}{2\pi \sqrt{LC}}$
 
-# Center Frequency with Fc and Fh
+## Center Frequency with Fc and Fh
 
 $f_{c} = \sqrt{f_{h}*f_{l}}$
 
@@ -124,11 +123,10 @@ When the two capacitors have the same capacitance, it can be calculated like thi
 
 $\displaystyle f_c = \frac{1}{4\pi\sqrt{LC}}$
 
-## Voltage Divider
+# Voltage Divider
 
 $V_{out} = V_{in}(\frac{R_{1}}{R_1+R_2})$
 
-
 # Angular Frequency ($\omega$)
 
 $\omega = 2\pi f = \frac{2\pi}{T}$ ^4ad7fc
@@ -146,8 +144,4 @@ $Z = \sqrt{R^2 + (X_L - X_C)^2}$
 
 # Current through a transistor
  
-$\displaystyle I_{EQ} = \frac{V_{BB}-{V_{BE}}}{\frac{R_B}{(\beta+1)}+R_E}$
-
-
-# Non-Inverting Amplifier Gain
-
+$\displaystyle I_{EQ} = \frac{V_{BB}-{V_{BE}}}{\frac{R_B}{(\beta+1)}+R_E}$
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diff --git a/Areas/upv/classes/ingles-especialidad/05-class.md b/Areas/upv/classes/ingles-especialidad/05-class.md
new file mode 100644
index 0000000..42d3465
--- /dev/null
+++ b/Areas/upv/classes/ingles-especialidad/05-class.md
@@ -0,0 +1,31 @@
+# Homework
+
+**5.**
+
+1. really
+2. incredibly
+3. very
+4. very
+5. absolutely
+6. extremely
+
+**6.**
+
+1. good
+2. delicious
+3. big
+4. appaling
+5. awful
+6. wonderful
+
+**7.**
+
+1. 
+2. What will you
+3. -to
+4. 5 
+5.  5
+6. 6
+7. 7
+8. 8
+9.  
\ No newline at end of file