$15x^2\:-29x\:-14\:\cdot5x\:+2$

$\log_{28}\left(1\right)$

$-12+\left(-15\right)+\left(-18\right)-\left(-14\right)$

$12\cdot\left(2^3\cdot3^2\right)^2\cdot8$

$\frac{1+\sin\left(a\right)}{1-\sin\left(a\right)}=\frac{\csc\left(a\right)+1}{\csc\left(a\right)-1}$

$\frac{3x^4+2x^2-5x+3}{x+3}$

$\int\frac{x+7}{\left(4x^2+3\right)^2\left(x-6\right)}dx$