$\frac{cos\left(x\right)}{1-sin\left(x\right)}-\frac{1}{cos\left(x\right)}=tan\left(x\right)$
$\sqrt[2]{x-5}\cdot\sqrt{x+2}$
$\lim_{x\to\infty}\left(cos\left(0.96^x\right)\right)$
$\sqrt[a]{x^b}\cdot\sqrt[c]{x^d}$
$\left(5x-33y\right)\left(5x-26y\right)$
$\frac{4x^{3}-3x^{2}+x+1}{x^{2}}$
$3-7+2-6$
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