Laura, James y Lily estaban charlando juntos y notaron que Laura es dos veces mayor que James. James, por otro lado, es dos años mayor que Lily. En total, sus edades suman 58 años. ¿Cuántos años tiene cada persona? (Dé solo el número)

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol