$4z^2=2^2\ast <!--\; \ast \; -->z^2=(2z{)}^2$
$9b^4=3^2\ast <!--\; \ast \; -->(b^2{)}^2=(3b^2{)}^2$
$25m^2=5^2\ast <!--\; \ast \; -->m^2=(5m{)}^2$
$64p^2=8^2\ast <!--\; \ast \; -->p^2=(8p{)}^2$

$16a^2{b}^4=4^2\ast <!--\; \ast \; -->a^2\ast <!--\; \ast \; -->(b^2{)}^2=(4a{b}^2{)}^2$
$81x^6{y}^4=9^2\ast <!--\; \ast \; -->(x^3{)}^2\ast <!--\; \ast \; -->(y^2{)}^2=(9x^3{y}^2{)}^2$
$49s^2{t}^8=7^2\ast <!--\; \ast \; -->s^2\ast <!--\; \ast \; -->(t^4{)}^2=(7s{t}^4{)}^2$
$25k^2{t}^{10}=5^2\ast <!--\; \ast \; -->k^2\ast <!--\; \ast \; -->(t^5{)}^2=(5k{t}^5{)}^2$

$\frac{16}{25}{p}^2{s}^4{t}^2=(\frac{4}{5}{)}^2\ast <!--\; \ast \; -->p^2\ast <!--\; \ast \; -->(s^2{)}^2\ast <!--\; \ast \; -->t^2=(\frac{4}{5}p{s}^{2}t{)}^2$
$\frac{9}{16}{m}^4{n}^{12}=(\frac{3}{4}{)}^2\ast <!--\; \ast \; -->(m^2{)}^2\ast <!--\; \ast \; -->(n^6{)}^2=(\frac{3}{4}{m}^2{n}^6{)}^2$
$\frac{4}{49}{a}^2{b}^{12}=(\frac{2}{7}{)}^2\ast <!--\; \ast \; -->a^2\ast <!--\; \ast \; -->(b^6{)}^2=(\frac{2}{7}a{b}^6{)}^2$
$\frac{25}{81}{x}^4{y}^8{z}^{16}=(\frac{5}{9}{)}^2\ast <!--\; \ast \; -->x\ast <!--\; \ast \; -->(y^2{)}^2\ast <!--\; \ast \; -->(z^4{)}^2=(\frac{5}{9}{x}^2{y}^4{z}^8{)}^2$

$0,01a^4{b}^8=0,1^2\ast <!--\; \ast \; -->(a^2{)}^2\ast <!--\; \ast \; -->(b^4{)}^2=(0,1a^2{b}^4{)}^2$
$0,04x^6{y}^6=0,2^2\ast <!--\; \ast \; -->(x^3{)}^2\ast <!--\; \ast \; -->(y^3{)}^2=(0,2x^3{y}^3{)}^2$
$0,49k^8{l}^{10}=0,7^2\ast <!--\; \ast \; -->(k^4{)}^2\ast <!--\; \ast \; -->(l^5{)}^2=(0,7k^4{l}^5{)}^2$
$1,21m^6{n}^4=1,1^2\ast <!--\; \ast \; -->(m^3{)}^2\ast <!--\; \ast \; -->(n^2{)}^2=(1,1m^3{n}^2{)}^2$