7x+9x+2
-2/5 + 7/15
13+(-16)
5/m + 5/m-10 = 3
(x+y)(x+3y)
differentiate
y-lny=10x^3-6x^2+4
(\sqrt((9x+27)))/(2x+10)+(\sqrt((9x+27)))/(z+5)=1
x^3+y^3=4
\dfrac{9}{(6x+11)(x+3)}-\dfrac{3x}{(3x+10)(x+3)}=
