$\int\frac{\sqrt{16+x^{2}}}{t^{2}}dt$

$\sin\left(a\right)=0.6$

$25x^2-100x$

$\frac{\left(cscx+1\right)\left(cscx-1\right)}{csc^2x}$

$\left(1-cos^2\left(x\right)\right)\left(1-cos^2\left(x\right)\right)\left(1-cos^2\left(x\right)\right)$

$\frac { 20 x ^ { 4 } } { 9 } - \frac { 2 x ^ { 2 } } { 3 } + \frac { 1 } { 25 }$

$y''+8y'-9y=0$