Simplify using properties of exponents such that all exponents are positive. Do not use other identities to simplify if possible. 

 sin18xcsc4xsin7xcsc2x=\displaystyle \frac{{{{\sin}^{{18}}{x}}\cdot{{\csc}^{{4}}{x}}}}{{{{\sin}^{{7}}{x}}\cdot{{\csc}^{{2}}{x}}}}=