20122013201420152016201720, 18201920, how many days are there respectively? Ask the great God for help

366 365 365 365 366 365 365 365 366

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1. 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 which is more beautiful? Ask God for help
2. 2013.2014.2015.2016 how many days in total
3. 1×2/1+2×4/1+4×6/1…… +How much is 2010 × 2012 / 1?
4. It is proved that the value of 2 + cosx + SiNx * cosx is always greater than 0
5. Can SiNx + cosx be greater than 1?
6. 4x-3 + 3x-4 = 14 solution 2 (X-2) + 2 = x + 1 solution 7x-16 = 66 + 2x solution 7 (x + 6) - 3x = 4 (2x + 5) solution 5x + 15-2x-2 = 16 solution
7. 2.5x-4.5 = 3x + 5.5 urgent and checking calculation
8. 5x=3x+12
9. 12+5X>3X How do you do it?
10. 2×(3x)=5x+12 It's better to write the process and why
11. How to calculate 2 + 4 + 6 + 4 + 2012 + 2014
12. Simplification (4 / (√ 2 + 2) + 4 / (2 + √ 6) + 4 / (√ 6 + √ 8) +... + 4 / (√ 2012 + √ 2014) (√ 2014 + √ 2)
13. Find the rule, fill in 1, 8, 27, (), (), (), write the process (that's why this is the calculation process)
14. 1 8 27 () find the law
15. Find the law, 1,8,27, (), () 1、1、3、4、7、9、15、16、31、25、（）、（）、( )、（）
16. 1x2 / 2005 + 2x3 / 2005 + 3x4 / 2005 + 4x5 / 2005 + 10 2005 out of 10 2004x2005 = ()
17. 1x2/2005+2x3/2005+3x4/2005+4x5/2005+.+2004x2005/2005=? Please tell me the calculation process again
18. 20051×2+20052×3+20053×4+20054×5+… +20052004×2005=______ ．
19. Observation: 2 = 1 * 2, 2 + 4 = 6 = 2 * 3 = 12 = 3 * 4, 2 + 4 + 6 + 8 = 20 = 4 * 5,..., calculation: 2002 + 2004 + 2006 +... + 2050
20. 2 = 1 * 2,2 + 4 + 6 = 12 = 3 * 4,2 + 4 + 6 + 8 = 20 = 4 * 5,... Calculate 2002 + 2004 + 2006 +... + 2050 according to the above formula