$\frac{\sin\left(b\right)}{\cos\left(b\right)}+\frac{\cos\left(b\right)}{\sin\left(b\right)}$

$\frac{\tan^2\left(x\right)-\sec^2\left(x\right)}{\csc\left(x\right)}$

$\int\frac{\left(7x+3\right)}{\left(x+1\right)^2}dx$

$t^2+2t-43=0$

$\int\frac{d\infty}{1+cos\infty}$

$y2-13y+30$

$\left(2x^2-5xy+6y^2\right)\left(3x^2+2xy-4y^2\right)$