11

17

15

13

$4+8x+2x+2$

$7x+18+3x-12$

$\frac{30}{5}+\frac{40}{5}x$

$6+10x$

$p-4$

$\frac{p}{4}$

$\frac{4}{p}$

$4:p$

$\frac{y}{4}$

y+4

$4\cdot y$

$1-\frac{3}{4}\cdot y$