$\lim_{x\to\infty}\frac{2^{x+3}}{3^{x+1}}$

$sec\left(x\right)\cdot\:\:sin^2\left(x\right)+cos\left(x\right)$

$3b^3-3b+2b^3+4b$

$\frac{\left(\cos\left(x\right)+\sin\left(x\right)\right)^2}{\sin\left(x\right)}=\csc\left(x\right)+2\cos\left(x\right)$

$2s^3+3s^2-3s-4$

$0.94-0.27$

$\int_{-\infty}^{-1}x^{-\frac{15}{7}}dx$