21f+2f=9f
5/8+6/16
4x +5/2 = 17*4 find x
$\frac{3}{8}$ $\frac{3}{x}$
2.49915/5x =(1/200)+1/(100+x)
2.42x1.23
\int_{-\infty}^{0}\frac{dx}{(x+1)^2}
5=-2*x+3
Find h(-4) and one value of x which h (x) = -3
-2x+3=0