cos0,79
2-2
3x + 1
------ =1
10
2x + 4 = 2
simplify 6(y+4)-2(3y-5)
simplify 10x-35-3x+12
(3b+9x)/(9a+6x)-(a-2x)/(2x+3a)=2
10x-35-3x+12 simplify
expand 2(a-3)+4(2a+1)
