$$7x-4=3x-8$$

$$\left|\left(x^{\left(n-2\right)}\right)^3+x^{\left(n-1\right)}\right|^2$$

$$12q^2-3k-12q^2+3k$$

$$\cos\left(a\right)\left(\tan\left(a\right)\cot\left(a\right)\right)=\csc\left(a\right)$$

$$y^4-2y^2+1$$

$$\int\frac{-4+5x^2+3x}{x^2}dx$$

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