$9\left(x-y\right)^2+12\left(x-y\right)\left(x+y\right)+4\left(x+y^2\right)$

$\frac{5}{3}x+4xy+\frac{7}{2}y+\frac{3}{2}x-2xy+\frac{2}{3}y$

$\left(\frac{1}{2}x^5+\frac{3}{4}y^3\right)^3$

$9^2\:x\:\:9^9$

$-5x^2+40x-65=0$

$\int_1^{\infty}\frac{x+2}{x+1}dx$

$9a^2-12ab+9z^2$