$log\left(\frac{\left(x+2\right)^2\left(x-7\right)}{\left(x-3\right)^2}\right)$

$log16\left(log5\left(x\right)\right)=\frac{1}{4}$

$b^{-\frac{1}{2}}$

$3.45+45$

$\frac{3t^2-5t-250}{t-10}$

$\int\frac{\left(sen\:y\right)}{cos^4\:y}dy$

$\frac{\cos\left(x\right)+1}{\sin\left(x\right)}=\cot\left(x\right)$