After removing 15 jellybeans, there were 37-15=<<37-15=22>>22 jellybeans in the jar.
After adding back 5 jellybeans, there were 22+5=<<22+5=27>>27 jellybeans in the jar.
After removing 4 more jellybeans, there were 27-4=<<27-4=23>>23 jellybeans left in the jar.
#### 23