docs: fix latex

PRECISION-ISSUE.md

@@ -197,7 +197,7 @@ def find_unlock_timestamp(rps, elt):
 ```
 
 <a name="unlock-interval-results"></a> For `rps = 0.000000011574e18` and `elt = 300`, it returns three subsequent
-timestamps $\{st + 87, st + 173, st + 260\}$ at which tokens are unlocked, where $st$ is the timestamp when last
+timestamps $(st + 87), (st + 173), (st + 260)$ at which tokens are unlocked, where $st$ is the timestamp when last
 snapshot was taken.
 
 ### Understanding delay with a concrete example
@@ -215,8 +215,8 @@ For [this example](#unlock-interval-results), the first set of timestamps for co
 $[st + 87, st + 172]$ and the second set would be $[st + 173, st + 259]$. The unlock intervals for these two sets are:
 
 ```math
-  ui_{solidity_1} = (st + 172 + 1) - (st + 87) = 86 \\
-  ui_{solidity_2} = (st + 259 + 1) - (st + 173) = 87
+ui_{solidity_1} = (st + 172 + 1) - (st + 87) = 86 \\
+ui_{solidity_2} = (st + 259 + 1) - (st + 173) = 87
 ```
 
 #### Case 1: when $t = st + 87$