$$\left(4cos\theta\:-6sin\theta\:\right)^{\left(2\right)}+\left(6cos\theta\:+4sin\theta\:\right)^{\left(2\right)}=52$$

$$\int\frac{1}{1+25x^{2}}dx$$

$$\frac{d^4y}{dx^4}\left(x^3+2x^2\left(-x\right)\right)$$

$$y'=-4ty^2$$

$$x-5\le2x-6$$

$$\int\left(3x^2-5\right)^44xdx$$

$$\left(x^{2\:}+16y^2-10x+64y+73=0\right)$$