$$\frac{96r^2d^6}{-12rd^3}$$

$$\lim_{x\to0}\left(\frac{4sin\left(x\right)}{x+cosx-\pi}\right)$$

$$125a^4b^5c^3+625a^2b^4c^7$$

$$3\sin\left(x\right)+5=5\left(\sin\left(x\right)+1\right)$$

$$0.247-\frac{48}{17}$$

$$4x^{a-2}-2x^{a-1}+x^a\cdot\:\:x^2+2x-1$$

$$\left(\:2x\:+\:2y\:+\:5\:\right)^2$$