$\int\frac{-2}{x^2+6x+5}dx$
$\left(x-5\right)^2-\left(x-7\right)\cdot\left(x+2\right)+9+5x$
$\sqrt[2]{x+4}-2\cdot\sqrt[2]{x+4}+2$
$\frac{\sec\left(a\right)-\cos\left(a\right)}{\sec\left(a\right)}$
$\frac{x^3-x^2-14x-24}{x+3}$
$4\left(1+m^{2}\right)-4\left(1+m\right)\left(n-1\right)+\left(n-1\right)^{2}$
$4\cos^2\left(x\right)=3$
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