30 (a2- 50+1) - 5b (b7+263 - 6b) 2 - 5b (2b2 - 3b + 2) 4x(-3x3 + 2x2 - x) 3 (403 + 3a2 - 6) • (- 2a2) (- 8x1 + 3x3 + x) • (- 3x2) 4 (5x4 - 4x3 + 2x) • (- 3x3) (6a - 2a3 - a2) • (- 4a4) 5 2a b • (3a7b - 2ab3 + 5) 3ab (4a7b - 2ab2 + a2 b) б 4a3b (2a3 + 3ab2 + b) 2x}уª (8x y - бy3 + 4x}) 10xy3 (5x4y - 2x3y2 _ x2) 5x2y4 (5xбy +2x}y2+10) 6x y(3xt +x}y2 - y + 4x) 7a- 63 (-3a7b ÷ 2b4 - 5a2) 9 Sab*(-2a2b+3a bt - 5a2) - 9a2 b=(-2a5+3b°- 4a3b3) 10 2a(a + 3) - 3(a-- 3) 2a(a- - 4) - 3a(02 +6) 11 4(x - 7) + 5(x +6) -4yª (5y - 1) +3y (2y2-y) 12 - 6(2x - 4) - 73x + 1) - 5a- (2a +7) - 3a2(4a - 5) 13 9(3x + 1) - 4(2x - 7) - 4b(6a - b) + 3a (3a + 7b) 14 4(x - 5) - 5(x +6) 7y(4x - 3y) - Sy(2x + бy) 15 - 3b(5a - b) + 6a (3b - a) 4n- (5n - 3m) + 3n2 (n - 9m) 16 4c (2c + 3p) - 2p (c - 4p) -5x3 (x - 4) +6x (x3 - 2) 17 -3y(2x - 5y) - 2y(5x - 4y) 6x (2x2 - 7x) + 3x (x - 2) 18 6x(x +4) + 3x(x - 7) 3а? (4a - 5b) - 2a- (3a - 2b) 19 10x* (4x +5) - 8x(2x} - x3) - 2a (3a2 - 6) + 5a (4a2+8) 20 6c2(3c - 4) - Te(e2 + 5c) 7x}(5x - x3) - 5x7(7x?+ x3) 21 4p (2p - p3) - 3p (2p" -p}) - 5y+(3y2 - 4y})+3y*(Sy - yt)

Certainly! It looks like you have a series of algebraic expressions to simplify and/or factor. Let’s break these into manageable parts. For each number you provided, I'll simplify the expression as needed:

1.

Expression:
\[ 30(a^2 - 50 + 1) - 5b(b^7 + 263 - 6b) \]
Simplified:
\[ 30(a^2 - 49) - 5b(b^7 - 6b + 263) \]
\[ = 30a^2 - 1470 - 5b^8 + 30b^2 - 1315b \]

2.

Expression:
\[ -5b(2b^2 - 3b + 2) + 4x(-3x^3 + 2x^2 - x) \]
Simplified:
\[ -10b^3 + 15b^2 - 10b + (-12x^4 + 8x^3 - 4x^2) \]

3.

Expression:
\[ (4a^3 + 3a^2 - 6)(-2a^2) + (-8x + 3x^3 + x)(-3x^2) \]
Simplified:
\[-8a^5 - 6a^4 + 12a^2 + (24x^3 - 9x^5 - 3x^3)\]

4.

Expression:
\[ (5x^4 - 4x^3 + 2x)(-3x^3) + (6a - 2a^3 - a^2)(-4a^4) \]
Simplified:
\[ -15x^7 + 12x^6 - 6x^4 + (-24a^5 + 8a^7 + 4a^6) \]

5.

Expression:
\[ 2ab \cdot (3a^7b - 2ab^3 + 5) + 3ab(4a^7b - 2ab^2 + a^2b) \]
Simplified:
\[ 6a^8b^2 - 4a^3b^2 + 10ab + 12a^8b^2 - 6a^3b^2 + 3a^3b\]

6.

Expression:
\[ 4a^3b(2a^3 + 3ab^2 + b) + 2x^y(8xy - 6y^3 + 4x) \]
Simplified:
\[ 8a^6b + 12a^4b^3 + 4a^3b^2 + 16x^2y^2 - 12xy^4 + 8x^2y\]

7.

Expression:
\[ 10xy^3(5x^4y - 2x^3y^2 - x^2) + 5x^2y^4(5x^6y + 2x^2y^2 + 10) \]
Simplified:
\[ 50x^5y^6 - 20x^4y^5 - 10xy^3 + 25x^8y^7 + 10x^4y^6 + 50x^2y^4 \]

8.

Expression:
\[ 6xy(3x - x^2y^2 - y + 4x) + 7a - 63(-3a^7b - 2b^4 - 5a^2) \]
Simplified:
\[ 18xy - 6x^2y^3 + 24x^2y + 7a + 189a^7b + 126b^4 + 315a^2\]

This pattern continues for each expression you have. However, please share which specific steps or other expressions you want simplified, or if you'd like me to proceed with more of the list you provided.