$20s+30s^{2\ }.$

$20s+30s^{\ }.$

$7y^2$

$8y^2$

$6y^2$

$14ab^3$

$18ab^3$

$20ab^3$

$24s^2+14s+14$

^$14s^2+14s+14$

$9at^2$

$14at^2$

$5at^2$

$4ab^2$

$6ab^2$

$ab^2$

$70abc$

$30abc$

$40a^2bc^2+30ab^2c+25abc$

$40a^2bc^2+30ab^2c+20abc$

$4a^2$

$6a^2$

$5t^2+7t+6$

$5t^2+7t$