Editing Calculator Core (section)

==History==
Calculator Core was first revealed to the community when Walroose released a preview on 11 December 2018, showcasing the basic gameplay and extension.<ref>https://www.youtube.com/watch?v=jKzvXaKtgew</ref> After a long period of inactivity surrounding the level, on 17 February 2019, Walroose uploaded an update video on all her upcoming projects, mainly Forever Asleep. Around halfway into the video, she stated that she had decided to turn Calculator Core into a mega-collaboration.<ref>https://www.youtube.com/watch?v=q0rP-4x_kaA</ref>

On 2 March 2019, Walroose uploaded a video showcasing her part in Calculator Core.<ref>https://www.youtube.com/watch?v=yCGJHSuX2rc</ref> The next day, on 3 March 2019, Zest uploaded a video showcasing his part in the level. In the video description, he stated that his part uses about 14,400 objects and is the second-to-last in the level.<ref>https://www.youtube.com/watch?v=3WUXqMPsL-M</ref> On 27 March 2019, Cytokinesis uploaded a video showcasing a transition for the build-up to her part in the level.<ref>https://www.youtube.com/watch?v=ZDLYP3i3lRg</ref> Three days later, on 30 March 2019, Spectex uploaded a video showcasing his part in the level as well as the end logo. In the video description, he stated that a preview will be posted on Walroose's YouTube channel very soon.<ref>https://www.youtube.com/watch?v=ovuzdykErZc</ref>

After about a month of inactivity, on 21 April 2019, Chuckgamer1 uploaded a video showcasing his part in Calculator Core.<ref>https://www.youtube.com/watch?v=3dLqexL42Jk</ref> The next day, on 22 April 2019, Isane uploaded a video revealing his part in the level. In the video description, he stated that it took him two weeks to complete.<ref>https://www.youtube.com/watch?v=qHpBWhUQ0BA</ref> About a week later, on 27 April 2019, Walroose released the first preview of the level, showcasing 10 out of 22 finished parts. In the comments section, she revealed that it is currently set to be verified by Zagros.<ref>https://www.youtube.com/watch?v=ZmKY2jQFiBU</ref>

On 17 May 2019, Walroose released a video showcasing her other part in Calculator Core, which subsequently replaced Hadeon.<ref>https://www.youtube.com/watch?v=xjkcgcKg6rw</ref> About two months later, on 20 July 2019, she uploaded a video showing the full level with the completed decoration. In the video description, she stated that it is now set to be verified by Crazen and is expected to be Top 10, maybe even Top 5.<ref>https://www.youtube.com/watch?v=MuDgir5s2UE&t=168s</ref> On 29 July 2019, Crazen began to progress on Calculator Core and achieved a start position run of 46-81%.<ref>https://www.youtube.com/watch?v=tjl09oRJfzc</ref> Over a month later, on 9 September 2019, he achieved a new best of 67%.<ref>https://www.youtube.com/watch?v=GsXqDXFYnGI</ref> On 23 November 2019, Crazen finally verified Calculator Core for his second-ever verification project (after Twisted Tranquility). In the video description, he stated that this was the most enjoyable XL Extreme Demon he had played to date.

On 7 December 2019, Calculator Core received its first victor, swiborg. swiborg beat the level in 16,312 attempts and said it is perhaps one of the most fun XL Extreme Demon levels ever, rating it 91/100 for enjoyment. On 18 December 2019, Calculator Core was rated and featured about three weeks after its release. It got rated at the same time as two other levels of similar difficulties, [[Renevant]] and [[Cognition]], as well as another Extreme, called TM18.