Java Bit Operation on Long - Removing some bits

I have a long number. Now, what I want to do is the following:

long l = "001000......10001100000" (bits representation)
 

I need to remove the 3^rd and 4^th bits of it (i.e. 10) from the left and convert the remaining 62 bits to long

long newl = "0000......10001100000" (bits representation)
 

Can anybody help me do this efficiently in Java ?

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