$\left(2x^2y-4x^3z^3\right)^3$

$\left(2\frac{1}{2}+3\frac{2}{3}+4\frac{1}{4}\right)\left(8\frac{1}{4}+6\frac{2}{3}-4\frac{1}{2}\right)\left(9\frac{2}{3}+20\frac{1}{4}\right)$

$9.8m^2\cdot65$

$\int sin^4\left(9q\right)cos\left(9q\right)dq$

$25x+12y-31x-8y+5x$

$7n^4\:=\:-7$

$8 x ^ { 3 } + 18 x ^ { 2 } - 86 x - 30$