$$\left(3a^2+4b\right)^3$$

$$\frac{d}{dx}\left(12+2x^2-x^4\right)$$

$$8.6+7-11.3-2.4+6-17-9+3$$

$$\frac{\left(20\right)\cdot\left(-6\right)\cdot\left(2\right)}{\left(-10\right)\cdot\left(2\right)}$$

$$\int_0^{\frac{\pi}{4}}\left(\frac{a^{\tan\left(x\right)}}{cos^2x}\right)dx$$

$$\:2^2+am+m^2$$

$$\frac{4}{3}x^2\left(9xy+\frac{5}{4}x-30y\right)$$