(x+2)(x+1)
50=(x^2)+2*x
5(3x+2)-2(4x-1)
1/X >= X
11x-(6-7x)=4x+(5x-10)
2*7=13
what frections are equlant to 1/5
4(y-2)=(y-3)
2x+(7x-8)=10
if tan^4A-tan^2A=1, prove that sin^4A+sin^2A=1
