$16a^2-b^2$

$-\cos c+3=2\cos c+6$

$\left(\:\frac{3}{2}\:x\:-\:4\right)^2$

$\left(2x^2+x-1\right)^2$

$\left(8x^4-3x^2+5x\right)-\left(7x^4+2x^2+3x\right)$

$\left(1+\tan\left(x\right)-\sec\left(x\right)\right)\cdot\left(1+\cot\left(x\right)+\csc\left(x\right)\right)=2$

$38m+28-8m$