$x^2-y^2=x^2-2xy+y^2$

$\left(3-\frac{3}{4}m^2y^4\right)\left(\frac{3}{4}m^3y^4+3\right)$

$-4.9+\left|-2.8\right|+\left|3.2\right|+\left(-64\right)$

$\sqrt[3]{8x^5}$

$\lim_{x\to0}\left(\frac{sin^{11}z}{z^{11}}\right)$

$x^2+6x+9=1$

$\int\frac{\sec\left(x\right)}{\tan\left(x\right)}dx$