$2\cdot\left(-6\right)-\left(-3+5\right)$

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

$\int\left(\frac{1}{\left(1+16x\right)}\right)dx$

$csc^3x=\left(1+cot^2x\right)cscx$

$x^2+3x+8>0$

$1.87-\left(-0.179\right)$

$\frac{dy}{dx}\left(y=x^{\frac{6}{x}}\right)$