(x^2+4)^2
4+3x+1-x=5+2x
3 x 3 - 3 / 3 + 3 =
1/4x+5x/2
3x^2= t*2x
2y-3 = t*y/2
x^2+y^2 =1
ab+b^2-a-b
2x=5+(-3)
9(x-4)-9(1-x)
compute 222 +(-145)
740 divide by 173