$\frac{dy}{dx}\left(1=e^x+e^y+x+2y\right)$

$\lim_{x\to\infty}\left(\frac{a}{\ln\left(1+\frac{1}{2x}\right)^{x+1}}\right)$

$45ax^2-30axy^2+5ay^4$

$\sin acba+\frac{\sin a}{\cos a\cot a}$

$-7b^9-5b^8-6b^7$

$\csc^42x\:-\:4=\:0$

$-3\cdot\left(2x^8+6x^6-3x^5+x^2-10\right)$