$2\log_{10}\left(y\right)-3\log_{10}\left(x\right)=2$

$\lim_{x\to\frac{1}{2}}\frac{4x^3-3x+1}{12x^3-8x^2-x+1}$

$\frac{3x^2+2x-3}{x-2}$

$-\frac{5}{2}+\frac{4}{3}\left(2a\right)$

$\frac{9-x^2}{x+2}$

$\int_0^1\cosh\left(t\right)dt$

$\left(6+-4\right)^2+\left(2+-4\right)+6\cdot3$