_*2+_*5
3x+7 + 7x+9 + 44
(x^2-1)*2(x-2)
27 N
36 4
141120000/441
28.900*(1+0.019)^42
square root of 49
($x^{-2}$y)(x$y^{-3}$ )
28,900*(1+0,019)^42