$a^4b^2-c^2$

$\int\frac{51x-1}{\left(x^2-5x\right)}dx$

$\lim\:_{x\to\:0}\left(\frac{2^x-3^x}{3x}\right)$

$\left(a+1\right)\left(x+y\right)=\left(a+1\right)x+\left(a+1\right)y$

$\frac{1}{\sin\left(a\right).\cos\left(a\right)}-\frac{\cos\left(a\right)}{\sin\left(a\right)}:\tan\left(a\right)$

$1-0.092$

$\frac{dy}{dx}=\frac{x^5-8y}{x}$