Calculate the given integral: ${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}4se{c}^6(7x)dx$

$\frac{4}{35}ta{n}^5(7x)-\frac{4}{21}ta{n}^3(7x)+\frac{4}{7}tan(7x)+C$

$\frac{4}{35}ta{n}^5(7x)+\frac{8}{21}ta{n}^3(7x)+\frac{4}{7}tan(7x)+C$

$\frac{4}{35}ta{n}^5(7x)-\frac{8}{21}ta{n}^3(7x)+4tan(7x)+C$

$\frac{4}{49}ta{n}^7(7x)-\frac{4}{7}sec(7x)+C$

$\frac{4}{49}ta{n}^7(7x)+\frac{4}{7}sec(7x)+C$