factorize b^2-81
\frac{(-\frac{1}{1-x^2}+\frac{1+x}{1-x})(\frac{2{(1-x)}^2}{x^2+4x+4}+\frac{{(x-1)}^3}{{(x+2)}^2})}{(\frac{x}{4-x^2})}
factorize x^2-3x-40
3/2x^2 times 3
1-(1-$sin^{2}$x )
expand and simplify (3d-2)(d+7)
determine if f (x,y)= x²+y²+2xy is differentiable at the point (0,0)
3{5 + 3[10 + 4 · 8]}
45 + ? = 32
if michael made 70 free throws and 3/5 of his free throws were succesful how many succesful free throws did he make?
