sum: #(6.0000,8.0000,10.0000,12.0000) 
diff: #(-4.0000,-4.0000,-4.0000,-4.0000) 
cross product: #(-4.0000,8.0000,-4.0000,0.0000) 
cross product (function): #(-4.0000,8.0000,-4.0000,0.0000) 
dot product: 70.000000 
#(1.0000,2.0000,3.0000,4.0000) #(5.0000,6.0000,7.0000,8.0000) #(-4.0000,8.0000,-4.0000,0.0000) 
