Find the difference of the polynomials. $\begin{array}{l}{x}^4+7x^3+5x-7\\ -\left(-3x^3+2x+7\right)\end{array}$

A) $x^4+10x^3+3x-14$
B) $x^4+10x^3+7x-14$
C) $x^4+10x^3+3x+14$
D) $x^4+4x^3+3x+14$
E) $x^4+4x^3+7x+14$

Difference

The result of subtracting one number from another, or the operation of subtraction itself.

Polynomials

Algebraic expressions that consist of variables and coefficients, combined using only addition, subtraction, multiplication, and non-negative integer exponents.

X

A commonly used variable or symbol to represent an unknown value in mathematics and algebra.