$\left(2a+5b\right)\left(3a+b\right)$

$\frac{d}{dt}\sqrt{t}e^{\sqrt{t}}$

$\frac{1-\frac{\sin\:\left(x\right)}{\cos\:\left(x\right)}}{-1+\frac{\cos\:\left(x\right)}{\sin\:\left(x\right)}}$

$4c^2+3c^2-4c$

$cot\left(x\right)+4csc\left(x\right)=0$

$\frac{dy}{dx}=-cscy$

$\int\frac{x^3}{\left(4x^2+9\right)^{\frac{3}{2}}}\:dx$