The math was on the Black and Gold’s side Tuesday night at TD Garden.

Not only were Pete DeBoer and the Stars coming to Boston on the second leg of a traveling back-to-back that began Monday night in Ottawa, but word that No. 1 defenseman Miro Heiskanen would be unavailable for Dallas came shortly before puck drop.

But with the Stars also in possession of the great equalizer known as goaltender Jake Oettinger (4-0-0 with a .959 save percentage entering play), this one was going to take more than simply showing up.

Fortunately for the Bruins, it was the members of the team’s second line, and another strong performance from Linus Ullmark, that paved the way for the promising math to play out to a 3-1 victory at TD Garden.

On the power play for the third time in the opening 20 minutes after ex-Bruin Colin Miller was whistled for an extra two after his fight with Connor Clifton in response to Clifton’s gigantic hit on Roope Hintz, Hampus Lindholm quite literally put it on a platter for Pastrnak. And Pastrnak did not miss.

Pastrnak could not have smashed the puck better than he did on that chance, and it was finally power-play goal No. 1 for No. 88, who entered Tuesday’s contest with a team-leading 19 shot attempts on the power play in 2022, but with zero goals to show for it.

Knotted up at 1-1 early in the second period after a game-tying marker from the Stars’ Wyatt Johnston — imagine my surprise when I read that name and realized it was not a character from Back To The Future III — it was yet another contribution from a second liner that pushed Boston ahead.

With the puck on his stick, Pastrnak sent a beauty of a feed towards Taylor Hall, who hammered the puck on goal and through Oettinger for the go-ahead tally with just 1:03 left in the frame.

The B’s locked it down from there, with yet another successful penalty kill after a puck-over-the-glass penalty from Trent Frederic, and another 10 stops from Linus Ullmark in what finished as a 30-of-31 night in net.

With the win, Ullmark improved to a 5-0-0 on the year, and bumped his save percentage up to .936 after beginning the day with an already-impressive .929.

And though this game was a tight one almost all the way to the end, the Black and Gold did let Ullmark breathe just a bit by way of Patrice Bergeron’s empty-net dagger scored with 27 seconds left in the game to make it 3-1.

On defense, Brandon Carlo made his return to the Black and Gold lineup after missing the previous four games with a concussion. The 6-foot-5 Carlo said that he felt ‘normal’ three days after suffering the concussion, which was his fifth diagnosed concussion since Apr. 2017.

Carlo finished Tuesday’s game with one shot and two blocked shots in 18:29 of time on ice.

To make room for Carlo on the backend, the Bruins scratched Jakub Zboril for the first time this season. The Bruins said that the message to Zboril, who had yet to record a point and had a plus-1 rating prior to the scratch, is that he needs to be more assertive at both ends of the ice. And to make room for Carlo on the roster following his activation from the injured reserve, the Bruins sent Jakub Lauko down to Providence.

The Bruins return to action Thursday night against the Red Wings.