3.
https://www.symbolab.com/solver/integral-calculator/%5Clim_%7Bx%5Cto%5Cinfty%7D%20x%5E%7B2%7De%5E%7B-x%7D%20%5E%7B%20%7D%20

6.
https://www.symbolab.com/solver/integral-calculator/%5Cint_%7B0%7D%5E%7B%5Cfrac%7B%5Csqrt%7B%5Cpi%7D%7D%7B2%7D%7D%20%20x%20cos%5Cleft(%20x%5E%7B2%7D%5Cright)%20dx%5E%7B%20%7D%20

5.
https://www.symbolab.com/solver/integral-calculator/%5Cint_%7B0%7D%5E%7B%5Cinfty%7D%20%20x%5E%7B2%7De%5E%7B-3x%7D%20dx%5E%7B%20%7D%20

6.
woflrame
https://www.wolframalpha.com/widgets/gallery/view.jsp?id=d94e49734c721cd23b80f90ae40520d5&reportprob=1
https://www.symbolab.com/solver/matrix-vector-calculator/det%20%5Cbegin%7Bpmatrix%7D3%264%5C%5C%203%266%5Cend%7Bpmatrix%7D

1-7 done -- 2:25 left

9
https://www.symbolab.com/solver/step-by-step/y%5E%7B''%20%7D%2B3y%5E%7B'%20%7D-%204y%3D0%2C%20y%5Cleft(0%5Cright)%20%3D5%2C%20y%5E%7B'%20%7D%5Cleft(0%5Cright)%20%3D%200%20

10.
https://www.symbolab.com/solver/step-by-step/z%20%3D%202e%5E%7Bi%20%5Cfrac%7B%5Cpi%7D%7B4%7D%7D

11.
https://www.symbolab.com/solver/step-by-step/%5Csum_%7Bn%3D0%7D%5E%7B%5Cinfty%20%7D0.2%5E%7Bn%7D

12.
https://www.symbolab.com/solver/step-by-step/%5Csum_%7Bn%3D1%7D%5E%7B%5Cinfty%20%7D%5Cfrac%7B3%5E%7Bn%7D%7D%7Bn!%7D

14/40 with 2:06 left 

17.
https://www.symbolab.com/solver/double-integrals-calculator/%5Cint_%7B0%7D%5E%7B1%7D%5Cint_%7Bx%7D%5E%7B1%7Dsin%5Cleft(y%5E%7B2%7D%5Cright)%20dxdy

18.
https://www.symbolab.com/solver/double-integrals-calculator/%5Cint_%7B0%7D%5E%7B%5Cinfty%7D%5Cint_%7By%7D%5E%7B%5Cinfty%7D2ye%5E%7B-x%5E3%7Ddxdy

26/40 done -> 1:41 left..

40/40 done -> 1:12 LEFT... BUT several in statistics sections were literally guessing.. so if I wanna get 75%, maybe I need to review ..? 


Summary
Submission	State	Marks / 40	Grade / 100	Review	Feedback
1	Finished
Submitted Friday, 3 July 2020, 11:35 PM
20	50		Unfortunately, you did not earn a passing grade.
Before you reattempt the test, we strongly recommend that you consider our list of free online resources to get up to speed. Please check your email for further instructions.
Highest grade: 50 / 100.
Overall feedback
Unfortunately, you did not earn a passing grade.
Before you reattempt the test, we strongly recommend that you consider our list of free online resources to get up to speed. Please check your email for further instructions.