$\left(4xy-\frac{1}{3}\right)\cdot\left(5x\right)$

$\sec\left(b\right)=\frac{\cot\left(b\right)+\tan\left(b\right)}{\csc\left(b\right)}$

$\left(-11\right).\left(-6\right)\cdot\left(+3\right)$

$4\left(2x+5\right)<4\left(x-1\right)$

$2x^2+9x-5$

$\left(n^3+2\right)\left(-2+n^3\right)-\left(n^3+1\right)\left(n^3-2\right)$

$\frac{1+\sin\left(x\right)}{1-\sin\left(x\right)}=\frac{\left(\sin\left(x\right)+1\right)^2}{\cos\left(x\right)^2}$