$\frac{x^{10}+x^8+x}{m+n}$

$2\log\left(x\right)-\log\left(4\right)=3\log\left(4\right)$

$x^2-44xy+484y^2$

$f\left(x\right)=\frac{1}{2}\ln\left(\frac{1+x}{1-x}\right)$

$743+-256+-91+303$

$\left(4-6\right).\left(8-3\right)-\left(5-9\right).\left(1-7+18\right)$

$1+cot2xsin2x=1$