$\frac{x^2-4}{x-1}$

$\int_{-6}^{\infty}\left(\frac{10\sin\left(x\right)}{x}\right)dx$

$x^2+2x+10=28$

$cot^4\left(x\right)+cot^2\left(x\right)=csc^4\left(x\right)+csc^2\left(x\right)$

$\left(\frac{2x^2}{5}-\frac{3}{7}\right)^3$

$\frac{7^5\cdot7^3}{7^2}$