$\int\:x^5-3x+8dx$

$\lim_{x\to0}\left(\left(\frac{x}{\sqrt{x^2+1}}\right)\right)$

$\left(2x^3+3y\right)\left(2x^2-3y^3\right)$

$\left(6x-7\right)^{\left(3\right)}\left(8x-9\right)^{\left(2\right)}$

$\left(x+y\right)^2=25$

$\log66=\log6+\log11$

$\frac{6f^2}{\sqrt{x+f}-\sqrt{x}}$