$\frac{x^{5\left(3\right)+3}-y^{5\left(3\right)+30}}{x^{\left(3\right)-1}-y^{\left(3\right)+2}}$

$4x^2y-7xy^2+x^2y+5xy^2+8xy-3y+8-7y-2xy+2y-x-1$

$\left(x+9xy^4\right)dx+e^{x^2}y^3dy=0$

$\lim_{z\to\infty}\left(1+\frac{1}{z}\right)^{z+2}$

$7\left(c-2d\right)+x\left(c-2d\right)$

$7a-8c+4b+6c-4b+3a$

$2x^2+5x^2-1$