$4cos\left(5x\right)=\frac{\sin\left(7x\right)-\sin\left(3x\right)}{\sin\left(x\right)\cos\left(x\right)}$

$\left(a+32\right)^2$

$y=\frac{x^2\left(x^3+1\right)^4}{e^x\left(x+1\right)^5}$

$1x^2-5x+25$

$7y+2<5y+12$

$\lim_{x\to\infty}\left(100x\right)^{\frac{1}{x}}$

$\left(5x^6-x^2+5x\right)\cdot\left(-3x^6-5x^2\right)$