$\int\frac{8x+3}{\left(16x^2+12x\right)^5}dx$

$3x+2y+9x$

$u^2-2u$

$5\log\left(y\right)-\log\left(x+1\right)+\log\left(1\right)$

$\left(1-\cos^2x\right)\left(\cot\left(x\right)\right)=\sin\left(x\right)\cos\left(x\right)$

$\frac{1}{2}a-\frac{2}{4}$

$\left(-2\right).\left(-4\right)-\left(-3\right).\left(-4\right)$