$$0,05\:x\:0,005$$

$$\left(-4m^2\right)\left(-2mn^2\right)\left(5m^3n^4\right)\left(-3m^2n^3\right)$$

$$-7\left(-2a+9\right)$$

$$\left(-6\right)+\left(+8\right)-\left(-3\right)+\left(-2\right)$$

$$\frac{2}{5}\:and\:\frac{3}{8}$$

$$\int\left(\frac{9}{x^3}\right)dx$$

$$\left(x+2\right)^4\left(7x-5\right)^3=y$$