$2\tan y+1=\frac{cosy+2seny}{cosy}$

$5x^4y\left(2y^4+11x^2y-13x^3y^2\right)$

$\frac{x^2+5y+6}{y^2+3y}$

$49a\:^2+112a+64$

$\left(\infty+1\right)^2-10^{2\left(\infty+1\right)}\left(99^{\infty}\right)\left(\infty^3+1\right)$

$4x^2+4x+4$

$\frac{cosx\left(x\right)}{1+sin\left(x\right)}+tan\left(x\right)$