I am not a tax expert but I do my own taxes - so go talk to a tax expert if you want to be confident in what you are doing. However, I bet a very few percentage of tax experts would know this stuff anyway. You'd probably have to go to a place that specializes in trading like GreenTraderTax.
That being said, this is how I would do it. You have to report the K-1 numbers, but these affect your cost basis. So if the K-1 shows a gain of $1,000, that means your cost basis is raised by $1,000 (you should see this in Box L of your K-1, Current year increase (decrease) - it would say $1,000). So supposing you got rid of all your SVXY shares, then on Schedule D (Form 8949) the reported cost basis would be $1,000 higher so it would counterbalance the profits on your K-1. Similary, if the K-1 shows a loss of $1,000, that means your cost basis is lowered by $1,000. You must keep track of your cost basis until you close out your SVXY position at which point you use that new cost basis on Schedule D (Form 8949). The important point is that even though you have to report the K-1 numbers, those are reflected in your cost basis so you aren't gaining or losing anything.
It may be different if you are not trading SVXY short-term, i.e., you do have to keep track of your cost basis until you sell the shares which can be complex if you are holding them long-term. Plus I believe there are other rules on cost basis but these generally only apply if you have held a security for a long time.
The way I like to think about it is if you just reported your SVXY trade without reporting the K-1 numbers (assuming you traded SVXY short-term and closed out the position by year end), then your tax liability would be correct. But the IRS is going to check for compliance on your K-1 so you have to match the numbers there but then transfer the opposite gain/loss to your cost basis. To make sure the IRS is able to match the transactions on your Schedule D (Form 8949), you should probably write out two entries - one for the trade reported by your brokerage and one that details the cost basis change. I.e., you want the IRS to be able to match the trades reported by your brokerage (and your brokerage has no clue what your K-1 says). If you paper file, I highly suggest writing a Notes Addendum section which details why you changed the cost basis for these trades and then on your tax return say something like "See Notes" where these cost basis changes happen.
In summary, it is just another example of red tape. And when you are short-term trading it just results in moving numbers around so that you can both satisfy your K-1 and Form 8949 reporting requirements simultaneously. But it should not affect your tax liability at all.