The recent sack of Everton coach Frank Lampard will affect the team more in this short time, so I doubt if Everton will even have that strength to compete with arsenal. Even before now Everton have been struggling which they are in the relegation zone.
It is a second club sacked Frank Lampard after Chelsea. After having good debut in Derby Country which helped him to get a chance working for Chelsea, Lampard started to have bad parts of his coach career. From Chelsea to Everton, he failed even he tried to take a job at a smaller club than Chelsea with Everton.
Arsenal are stronger than Everton and they have outstanding form right now. Together with chaotic changes in Everton after Lampard sack, chance for Everton in the match is too small.
This next game against Everton should be an easy one for Arsenal judging by their level this season, Arsenal have been unbeaten in the past 11 games while Everton is struggling in the relegation zone plus they just sacked Lampard. I doubt they will be in good shape mentally to face a very dominant Arsenal side. The gunners will be extending their lead to a 8 point gap.
After beating Manchester United and other big clubs previously, Everton won't bring too much fear to Arsenal. They will start the match with 3 points earning task but being careful is important. When a club like Everton is forcing to the edge, they can bounce very strong like a spring.
Arsenal can expand their gap with Manchester City to 8 points temporarily and create more pressure on their competitor after the match with Everton.