[tex]15x^{2} +6x-30[/tex] = 15*x*x+6*x-30
[tex]\frac{x}{5} - \frac{x^{2} }{8}[/tex] = x/5-x*x/8
[tex]\frac{x-y}{2x+6}[/tex] = (x-y)/(2*x+6)
[tex]2^x-18x^{2}[/tex] = pow(2,x) - 18*x*x
[tex]\sqrt{x-5}[/tex] = sqrt(x-5)
[tex]\sqrt{x^{2} -5\sqrt{x} }[/tex] = sqrt(x*x-5*sqrt(x))
[tex]\frac{x^{2}*\sqrt{x+6} }{x+2}[/tex] = (x*x*sqrt(x+6))/(x+2)
[tex]8x-4 + \sqrt{x}[/tex] = 8*x-4+sqrt(x)
[tex]\frac{\sqrt{x} +8x^{2} -18}{15x-6}[/tex] = (sqrt(x)+8*x*x-18)/(15x-6)
[tex]\frac{\frac{x+4}{x^{2}}+15x+\sqrt{\frac{x+6}{4} } }{x^{3}+9 }[/tex]= (((x+4)/(x*x))+15*x+sqrt((x+6)/4))/(x*x*x+9)
