(1+7)+2= +2
5=7*10^(-3x)
cos(y)=315
root 80 as a surd
solve this in cosine law cosα=0.6875
3-x= - $\frac{4}{x}$
(2+m)(2+m)(2+m)(2+m)(2+m)
i=1
∑
h+1
2
i
=
h
2⋅2
−(h+2)+
.
102/360 times 19
