Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
King Mithradates acted with greater moderation. He refrained from aggressions in Asia Minor, and contented himself with-- what no treaty forbade--placing his dominion along the Black Sea ona firmer basis, and gradually bringing into more definite dependence the regions which separated the Bosporan kingdom, now ruled under his supremacy by his son Machares, from that of Pontus. But he too applied every effort to render his fleet and army efficient, and especially to arm and organize the latter after the Roman model; in which the Roman emigrants, who sojourned in great numbers at his court, rendered essential service.
Demeanor of the Romans in the East - Egypt not Annexed
The Romans had no desire to become further involved in Oriental affairs than they were already. This appears with striking clearness in the fact, that the opportunity, which at this time presented itself, of peacefully bringing the kingdom of Egypt under the immediate dominion of Rome was spurned by the senate. The legitimate descendants of Ptolemaeus son of Lagus had come to an end, when the king installed by Sulla after the death of Ptolemaeus Soter II Lathyrus--Alexander II, a son of Alexander I--was killed, a few days after he had ascended the throne, on occasion of a tumult in the capital (673).
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Reference address : https://www.ellopos.net/elpenor/rome/5-02-rule-sullan-restoration.asp?pg=19