y= 2(x+5) -7
2*n^6 - 6*n^5 + 5*n^4 - n^2 + 12
factorize
6*n^4 - 21*n^3 + 31*n^2 - 31*n + 30
5x-6=10x+10
2x-9=5x-33
8x-7=4(x+1)+7
Expand (n^2-3n+1)(2n+3)=
18-12/3*2+4
7%=14/n
((1/2)x^(1/2)-(1/2)x^(-1/2))^2
