$\left(-\frac{3x^2}{5}\right)^5$

$( x ^ { 4 } - 4 y - c ^ { 2 } ) ^ { 2 }$

$\left(\left(-x\right)^6:\left(-x\right)^3\right)^3.\left(-x\right).\left(-x\right)^{-4}$

$\csc-\sin=\frac{\cot^2}{\csc}$

$\int\frac{\sqrt{x^2-+36}}{4x^2}dx$

$\frac{m^4n^4}{3m^4n^2}$

$\int2x\left(x^2+1\right)^7dx$