You may have seen some of these before...
[tex]\frac{1\cancel{6}}{\cancel{6}4}=\frac{1}{4}[/tex]
[tex]\frac{1\cancel{9}}{\cancel{9}5}=\frac{1}{5}[/tex]
[tex]\frac{\partial}{\partial x}\sin^2(x)=\sin(2x)[/tex] -- just move down the 2.
You may have seen some of these before...
[tex]\frac{1\cancel{6}}{\cancel{6}4}=\frac{1}{4}[/tex]
[tex]\frac{1\cancel{9}}{\cancel{9}5}=\frac{1}{5}[/tex]
[tex]\frac{\partial}{\partial x}\sin^2(x)=\sin(2x)[/tex] -- just move down the 2.