$\left(-7x^4+6x^2+6x+5\right)-\left(3x^5-2x^2+2\right)$

$\left(\frac{2}{3}f-2d\right)^2$

$81a^2\:-\:y^2$

$\left(5c^3\right)^4\left(c^2\right)^5$

$\int\cos\left(x\right)\sin\left(y\right)dx$

$\int\frac{\left(3x^2-x+3\right)}{\left(x-2\right)^3}dx$

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