$\log\left(\sqrt[2]{x+15}\right)+\log\left(\sqrt[2]{x}\right)=1$

$\int\frac{49}{x^2\sqrt{49-x^2}}dx$

$2x-3\frac{dx}{dy}=x^4e^{3y}$

$\int\frac{x^2+7}{\left(x^2-17x+72\right)}dx$

$2\tan\left(x\right)=\sin\left(x\right)\cdot\tan\left(x\right)$

$\frac{-cot\left(x\right)+tan\left(x\right)}{csc\left(-x\right)}$

$\log3+\log a-\log2+\log b$