$\left(a\cos\left(x\right)+b\right)^2$

$6x-30+2x$

$3\cdot0^4-5\cdot0^2-1$

$\lim_{x\to0}\frac{x}{5+sin\left(x\right)}$

$4x^2+5x+3=0$

$\int\left(\sec\left(y\right)\left(\tan\left(y\right)-\sec\left(y\right)\right)\right)dy$

$\lim_{x\to0}\left(\frac{5x\left(cos8x\right)-1}{sin9x-9x}\right)$